What Size Fuse For 140 Amp AlternatorIf you have 2/0 coming from the battery to the front, then run a #6 or #4 from the alternator over to that wire. The alternator to fuse box wire is 4 gauge; so, this short fuse box to battery wire is the weak link - not any more. I have a 105amp and run #4 over to the feedthru on my firewall which has a huge cable going to the back. Stereo amp, - you'll have to run a 4,6,8 gauge wire to your trunk from the battery fused with a 30/60 amp fuse, etc. You can bypass it with a cable (4 gauge or so) directly from the battery positive terminal to the alternator batt + terminal. An example of a primary alternator fuse. Click to expand I agree that you don't need the fuse, but the factory wire has a fusable link in the cable. If your amp has an internal fuse, then your inline car amp fuse should be a bit larger. Electric Fans - You will run relays most likely, and the power goes TO the relay from the source. Fuse it as close to the battery as you can with a 150 amp fuse. It seems like one should get a fuse that's a little bit larger than the alternator, IF you have wires that can handle the max alternator amperage. 150 Amp #3/0 ga. Can someone explain maxi fuse's for me? I just put in a cs-144 (140 amp) alternator. car audio store should have that. The amp you are getting calls for a 300A fuse, and accepts 1/0 power and ground. If you get a short circuit, it seems like you'll get way more current than what the alternator normally can put out. CS144 alternator can generate 80-110 Amp electric current at engine idle, it is sufficient for some extra electric equipments. If the wire between the fuse and the alternator touches ground, your alternator output is touching ground. Accordingly, I be happy with a fuse, at the alternator, sized at anywhere between 40A and 60A, for a 35A alternator /w #8 wire. The amp you are getting calls for a 300A fuse, and accepts 1/0 power and ground. uPu4u7zt6wXcMQk4eBMTFuRU-" referrerpolicy="origin" target="_blank">See full list on footprinthero. - one fuse right at the main battery terminal. The fuse is 140 amps. The Powermaster one-wire alternators have a black plug cover on the side of the alternator. and wiring in case of a short circuit. 00 2500 24v 2wd Trailer puller New addition 99 3500 4x4 black on black Reply Save Like 1 - 8 of 8. 100/105 Amp Alt. If it is smaller, it will blow at full load. For V belt units follow attached pulley tag. See your alternator instruction sheet for further details. If you have 2/0 coming from the battery to the front, then run a #6 or #4 from the alternator over to that wire. You can bypass it with a cable (4 gauge or so) directly from the battery positive terminal to the alternator batt + terminal. Battery Wire Size Chart for Battery Wire to Alternator Battery Wire Size per Voltage, Amperage Load and Length Chart below shows Minimum cable size to use (AWG wire). Answer: Yes, you should put a fuse as close to the battery positive as possible. However, lets look at a situation where it's winter, at night, and the battery has becomes discharged. 140 amp alternator upgrade. SO I would go with a 300A fuse there. Wire size for Battery Isolator Blanket Statement: Use 2/0 wire. Fuse for car amp size (amperes) = Max power rating of the amp (Watts) / voltage rating of the alternator in volts. Some trucks may have it installed as OEM option, GM Pro-Code 8A5 if you can find it on your glove box cover. There are two ways to choose a fuse size: Use the manufacturer’s recommended fuse size Calculate the fuse size yourself. 140 amp fuse from advanced here too. The fuse should be in excess of the alternator draw to prevent nuisance fuse blowing,like an 80 amp fuse for a 60 amp generator or. the alternator is 145 amps if that helps. (however they mimic links better than fuses because they take longer to trip at that rating). the alternator is 145. Then, with a small screwdriver, unlock and push into fuse box each of the fuse holder assemblies/connectors. Under NORMAL circumstances you will never have a problem with the 10 ga wire and a 140 amp alternator as long as the battery you have installed is not larger than stock AND it stays charged. It seems like one should get a fuse that's a little bit larger than the alternator, IF you have wires that can handle the max alternator amperage. For example, if your alternator outputs 200 amps, you should choose a fuse that's no less than 200 amps. While the size of your fuse depends on the amperage of your alternator, you should generally select a fuse that can handle more amperage than your alternator is able to output. Short lengths will handle a lot more amps for brief periods. But when I look for what size fuse to replace it with i see 120 and 140 amp fuses so I didn't know if anyone knew the answer as to why and if you guys could let me know what size your fuse is. While the size of your fuse depends on the amperage of your alternator, you should generally select a fuse that can handle more amperage than your alternator is. The rating may not reflect the size if the efficiency is better on one than the other (Full spec sheet needed) If the small one excites the alternator, give it a whirl. 5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. If we assume you’re using a 14 V alternator, then you are going to need a 70 Amp fuse for your amplifier. I would definitely go for the 150 amp in whichever style you decide on. How do you pick the right size for your van? Sizing a DC-DC. Gus87, Aug 27, 2019 #1 Aug 27, 2019 at 6:43 PM # 2 TnShooter The. One thing I found on doing this was that the wiring wasn't big enough for the amps when everything was turned on. - one fuse right at the main battery terminal. The filiment in a usable idiot light is way smaller then the leads on either diode. It seems like one should get a fuse that's a little bit larger than the alternator, IF you have wires that can handle the max alternator amperage. So 4 ga would need an 8 ga fuse link wire. Also, look at the wire size for your alt output lead. Installed a 100 amp 1 wire & I can't find my chart on computer for wire size to alternator. From an electrician's point of view and from the National Electrical Code,#10 wire is rated for a continious 30 amps at around 180 degrees depending on the type of wire insulation. The rating may not reflect the size if the efficiency is better on one than the other (Full spec sheet needed) If the small one excites the alternator, give it a whirl. An example of a primary alternator fuse. The SI series alternator will only have 2 slotted holes in the connector. CORRECT WIRE SIZE IS CRITICAL Alternator Rating Wire Size Available Kits 75 Amps 10 gauge High Output Alternator Wiring Kit 555 -10510 100 Amps 8 gauge 150 Amps 6 gauge To complete your installation, we also recommend our 50 amp fuse with block and cover (# 555-10520) for even more safety. If you never plan on using more than a 50amp alternator then #6 will be just fine. the standard alternator is the K68 105Amps. Posted May 7, 2016 about to buy wire to upgrade my big 3, but cant find any forums or information that say what size fuse i need for the wire. then the optional for optional equipment is KG8 130amps. Answer: Yes, you should put a fuse as close to the battery positive as possible. 140 Amp Fuse for 90982-08286 24370-79920 MU840042 18980-04805 & for Falcon PAL Bolt on type fuse commonly for Alternator Fitment on the following vehicles: TUCSON XG300 XG350 FX50 I30 GX460 GX470 LS430 LX470 LX500h NX200t NX300 NX300h RX300 RX350 RX400h SC300 SC400 SC430 MAXIMA QUEST 4RUNNER HIGHLANDER LANDCRUISER MARAI RAV4 SEQUOIA SIENNA. I plan on upgrading the 100 amp fuse soon. Battery Wire Size Chart for Battery Wire to Alternator Battery Wire Size per Voltage, Amperage Load and Length Chart below shows Minimum cable size to use (AWG wire). What size fuse should I use for my amp? The correct size of fuse to use depends on the amp you are wiring. (This wire should match charge wire size). Those of you without the 130 amp alternator will not have to worry as much. And don't be afraid to fuse that alternator wire to protect the equipment and wiring in case of a short circuit. Yes you need to go larger, if you don't you will be replacing fuses often, a 150~175 amp fuse should be good if you are using a winch and other acc's Broncobowsher Contributor Total hack Joined Jun 4, 2002 Messages 33,981 Feb 22, 2012 #8 You need a larger fuse then the possible output of the alternator. Answer: Yes, you should put a fuse as close to the battery positive as possible. To complete your installation, we also recommend our 50 amp fuse with block and cover (# 555-10520) for even more safety. the standard alternator is the K68 105Amps. I was thinking of replacing the old 14 ga fusible link with a maxi-fuse but I can't figure out what fuse it would need. The fuse should not be a greater capacity than the alternator output if at all possible. DC-DC chargers and battery isolators comes in different sizes, indicated by amperage (i. What size fuse for a 2000 Watt amp? With a 14 V alternator, a 140 Amp fuse is best for your 2000W amplifier. While the size of your fuse depends on the amperage of your alternator, you should generally select a fuse that can handle more amperage than your alternator is able to output. For this installation we recommend Alternator Ground Wire # 555-10141 (sold separately). This can be removed and the GM or aftermarket two-spade wiring harness can be plugged in for three-wire operation. You can unhook the old one or follow. Upon startup the 120amp fuse blew. 2/0 wire will be enough for 95% of applications. Since fuses restrict current flow, the fuse rating should be about 20% over the output rating of the alternator. 140 Amp Fuse for 90982-08286 24370-79920 MU840042 18980-04805 & for Falcon ; PAL Bolt on type fuse commonly for Alternator ; Fitment on. Use the Manufacturer’s Recommended Fuse Size Let’s say you’re designing a solar power system and you want to place a fuse between your solar charge controller and battery bank. Also, if it's one of those alternators that was wound up to 140. What size fuse for a 2000 Watt amp? With a 14 V alternator, a 140 Amp fuse is best for your 2000W amplifier. Gus87, Aug 27, 2019 #1 Aug 27, 2019 at 6:43 PM # 2 TnShooter The TacomaWorld Stray Joined:. (however they mimic links better than fuses because they take longer to trip at that rating). For instance, if your amp has an internal 20 amp fuse, then you should go for a 25 or 30 amp inline fuse. Also of Interest: Equivalent of Wire and Sheet Metal Gauges in Inches Guide to Automotive Wire and Fuse Sizes How To Convert a Car Alternator into a Go Kart Motor How to Make Spark Plug Wires How To Solder Wires Like A Pro. It's possible, then, that the 5 gauge wire will heat up and possibly catch on fire before the fuse blows. How many amps can a 60 amp breaker handle?. upgraded wire running from alt to battery which had a 120amp fuse in it. Does it matter which way an inline fuse goes? You don't need to worry about which way your car amp fuse goes. I just upgraded to a 180amp alternator on my daily S-10. 140 Pcs Fuses Automotive Kit - Blade Auto Fuse Assortment Standard and Mini Car Fuse for Marine, RV, Camper, Boat, Truck (5A 7. Posted May 7, 2016 about to buy wire to upgrade my big 3, but cant find any forums or information that say what size fuse i need for the wire. For instance, if your amp has an internal 20 amp fuse, then you should go for a 25 or 30 amp inline fuse. 140 Amp Fuse for 90982-08286 24370-79920 MU840042 18980-04805 & for Falcon ; PAL Bolt on type fuse commonly for Alternator ; Fitment on the following vehicles: TUCSON XG300 XG350 FX50 I30 GX460 GX470 LS430 LX470 LX500h NX200t NX300 NX300h RX300 RX350 RX400h SC300 SC400 SC430 MAXIMA QUEST 4RUNNER HIGHLANDER LANDCRUISER MARAI RAV4 SEQUOIA SIENNA TACOMA TUNDRA. just put in a 140 amp fuse or two fuses close to that. The fuse is there to keep amperage below a certain amount. What is the correct size fuse to use in this situation? I am running the Taurus e-fan on my s-10 and the high setting uses a lot of juice, heh heh Thanks. Fine Stranded Stereo wire makes great battery cable giving the best gage wire for proper battery charge. Also, if it's one of those alternators that was wound up to 140 amp, be ready to replace it in a year or so. There are two ways to choose a fuse size: Use the manufacturer's recommended fuse size Calculate the fuse size yourself Let's look at an example for each scenario. I plan on upgrading the 100 amp fuse soon. You don't need a fuse between the alternator and battery, that connection is not normally fused. The Powermaster one-wire alternators have a black plug cover on the side of the alternator. The fuse should not be a greater capacity than the alternator output if at all possible. Measure battery voltage across the posts with the battery disconnected. If your amp has an internal fuse, then your inline. Also of Interest: Equivalent of Wire and Sheet Metal Gauges in Inches Guide to Automotive Wire and Fuse. The first is the alternator output rating, which is the amount of current that a unit is capable of producing at a specific rotational speed. Remove 10mm nut by the 140 amp fuse. See your alternator instruction sheet for further details. What is the correct size fuse to use in this situation? I am running the Taurus e-fan on my s-10 and the high setting uses a lot of juice, heh heh Thanks. On the dyno sheet the alternator actually maxed out at 196amps. It seems like one should get a fuse that's a little bit larger than the alternator, IF you have wires that can handle the max alternator amperage. I upgraded my alternator to the tow package one, I think it's 130 amps. What size fuse should I use for my amp? The correct size of fuse to use depends on the amp you are wiring. Insert volt meter probe into the 1st cell and the other probe into the 2nd cell. Amazon's Choice in Automotive Replacement Fuses by EDS $1207 Get Fast, Free Shipping with Amazon Prime FREE Returns About this item 140 Amp Fuse for 90982-08286 24370-79920 MU840042 18980-04805 & for Falcon PAL Bolt on type fuse commonly for Alternator. I use a 140 amp auto isolator switch and have had no issues. You don't need a fuse between the alternator and battery, that connection is not normally fused. com/_ylt=AwrFFzhSlWFk7QYygklXNyoA;_ylu=Y29sbwNiZjEEcG9zAzQEdnRpZAMEc2VjA3Ny/RV=2/RE=1684145619/RO=10/RU=https%3a%2f%2ffootprinthero. It is there to protect the battery. A 250 or 300 ampere aftermarket high output alternator should provide enough power for all your car's systems and your high-powered stereo too. FREE delivery Thu, May 11 on $25 of items shipped by Amazon. High-output alternators (greater than 100 amp) need a minimum of an 8-or-larger gauge charge wire to reduce resistance. Stock is a 10ga wire with a 14 ga fuse link wire. com%2ffuse-size-calculator/RK=2/RS=fH. An example of a primary alternator fuse. Fuse; 140 Amp; 9/16 Inch Bent Male Terminal; Aftermarket - Carded 1-Pack of PAL (R) Automotive Type Blade Fuses PAL (TM) Fuses are available in. If the wire between the alt and the fuse going to the battery hits ground then the amperage would spike and blow the fuse before it got to the battery. Between your alternator and battery, keep it between 300A and the max output of your alternator. Under NORMAL circumstances you will never have a problem with the 10 ga wire and a 140 amp alternator as long as the battery you have installed is not larger than stock AND it stays charged. 5A 10A 15A 20A 25A 30A 40AMP) 1,268. Wire runs from starter batt terminal to back of alternator. 140 Pieces Fuses Automotive - Standard Blade Car Fuse Kit, Auto Fuse Assorted for Marine, RV, Camper, Boat, Truck (1A 2A 3A 5A 7. If you have a 200A alternator, use a 240A fuse. These instructions can be applied to factory/OEM wiring or to a Painless Performance chassis harness. or a circuit breaker if you have room, lots easier to reset than take off cover and replace fuse. A Alternator Ground:Many mounting brackets are weak/defective battery will cause premature failure. See more Reply Save Like Mr Tacomi · #3 · Jun 2, 2011 1, 2, and 3. Can someone recommend what size fuse I would use. My question is what size inline fuse to use on the alternator wire?. Upon startup the 120amp fuse blew. The alternator is driven off the engine. Use the Manufacturer's Recommended Fuse Size Let's say you're designing a solar power system and you want to place a fuse between your solar charge controller and battery bank. Normally you use one 2 auto gauge sizes smaller than the cable. Most stock alternators are in the 80-120 ampere range and can only supply about 40% to 50% of that for non-automotive uses like amplifiers. The chart below charts the gauge wire required based on alternator amperage output and length of wire. what size fuse? 11602 Views 9 Replies 6 Participants Last post by aconsola , Jan 30, 2011 M mekken Discussion Starter · Jan 28,. 140 Amp Fuse for 90982-08286 24370-79920 MU840042 18980-04805 & for Falcon PAL Bolt on type fuse commonly for Alternator Fitment on the following vehicles: TUCSON XG300 XG350 FX50 I30 GX460 GX470 LS430 LX470 LX500h NX200t NX300 NX300h RX300 RX350 RX400h SC300 SC400 SC430 MAXIMA QUEST 4RUNNER HIGHLANDER LANDCRUISER MARAI RAV4 SEQUOIA SIENNA. powder/clear coated, painted, or plated. But when I look for what size fuse to replace it with i see 120 and 140 amp fuses so I didn't know if anyone knew the answer as to why and if you guys could let me know what size your fuse is. 150 Amp ***Delco CS130D alternator requires the part #640059 sense wire which is included with Waytek Stock Number 80093 (144-CD) kit or The CS 130D alternator has 4 holes all the same size. If we assume you're using a 14 V alternator, then you are going to need a 70 Amp fuse for your amplifier. 00 2500 24v 2wd Trailer puller New addition 99 3500 4x4 black on black Reply Save Like 1 - 8 of 8 Posts This is an older thread, you may not receive a response, and could be reviving an old thread. i have welding wire for all my power wires. 150 Amp #2/0 ga. For instance, a 100A alternator has a “rated” output of 100A, which. Fuse it as close to the battery as you can with a 150 amp fuse. It's kind of hard to imagine a scenario where you will actually be seeing the alt put out all 140 amps, but you can bet it will happen at an inconvenient time to blow a fuse or a breaker. The fuse is there to keep amperage below a certain amount. If you match the fuse size (amp rating) to the alt's amp rating, then kiss your alt goodbye if it develops a problem. A fully charged battery is at least 12. All you need is to apply this simple formula: Fuse for car amp size (amperes) = Max power rating of the amp (Watts) / voltage rating of the alternator in volts. I plan on upgrading the 100 amp fuse soon. 140 Pieces Fuses Automotive - Standard Blade Car Fuse Kit, Auto Fuse Assorted for Marine, RV, Camper, Boat, Truck (1A 2A 3A 5A 7. also i will have a XS D3400 under the hood too very soon. So 4 ga would need an 8 ga fuse link wire. What size fuse should I use for my amp? The correct size of fuse to use depends on the amp you are wiring. 140/155 Amp Alt. car audio store should have that or a circuit breaker if you have room, lots easier to reset than take off cover and replace fuse. CORRECT WIRE SIZE IS CRITICAL Alternator Rating Wire Size Available Kits 75 Amps 10 gauge High Output Alternator Wiring Kit 555 -10510 100 Amps 8 gauge 150 Amps 6. The fuse is 140 amps. What size fuse should I use for my amp? The correct size of fuse to use depends on the amp you are wiring. 140 Amp; 13/16 Inch Bent Male Terminal; Fuse; Aftermarket - Carded 1-Pack of PAL (R) Automotive Type Blade Fuses PAL (TM) Fuses are available in. I have a 200 amp alternator, and a 250 amp fuse. I would check the size of wiring you have going from the alternator to the Battery. Since fuses restrict current flow, the fuse rating should be about 20% over the output rating of the. 150 Amp #0 ga. The filiment in a usable idiot light is way. The fuse is 140 amps. Yes you need to go larger, if you don't you will be replacing fuses often, a 150~175 amp fuse should be good if you are using a winch and other acc's Broncobowsher Contributor Total hack Joined Jun 4, 2002 Messages 33,981 Feb 22, 2012 #8 You need a larger fuse then the possible output of the alternator. For example, if your alternator outputs 200 amps, you should choose a fuse that’s no less than 200 amps. Stereo amp, - you'll have to run a 4,6,8 gauge wire to your trunk from the battery fused with a 30/60 amp fuse, etc. A number 8 wire is more than adequate. what size fuse? 11602 Views 9 Replies 6 Participants Last post by aconsola , Jan 30, 2011 M mekken Discussion Starter · Jan 28, 2011 I just did the delco remy cs144 alternator upgrade to my 88 I6 and rewired the whole charging system with 4 awg wire. just put in a 140 amp fuse or two fuses close to that. You probably don't have a hydrometer but can check the individual battery cells. As you might know, the alternator charges the battery and supplies electricity to the vehicle whenever the engine is running. I plan to replace the 10 gauge alternator wire with at least an 8 gauge wire. HIGH AMPERAGE ALTERNATOR KIT (140-190 AMPS) This alternator kit provides necessary components needed when upgrading your vehicle’s charging system with a larger amperage alternator. 140 Amp; 13/16 Inch Bent Male Terminal; Fuse; Aftermarket - Carded 1-Pack of PAL (R) Automotive Type Blade Fuses PAL (TM) Fuses are available in current ratings up to 120 amperes, with either female or bolt-on terminals. As you might know, the alternator charges the battery and supplies electricity to the vehicle whenever the engine is running. Alternator Wire Gauge Size Chart. Any time you upgrade your alternator, you should also strongly. Although I understand Charlie’s concern, I (FWIW) don’t view the battery as a power source to the alternator, and wouldn’t require a fuse at the load end (batt). The fuse is there to keep amperage below a certain amount. Also, if it's one of those alternators that was wound up to 140. Please consider creating a new thread. Fuse; 140 Amp; 9/16 Inch Bent Male Terminal; Aftermarket - Carded 1-Pack of PAL (R) Automotive Type Blade Fuses PAL (TM) Fuses are available in current ratings up to 120 amperes, with either female or bolt-on terminals. You can unhook the old one or follow it through the loom and remove it if you want to. DC-DC chargers and battery isolators comes in different sizes, indicated by amperage (i. The alternator is driven off the engine by a belt, which allows the alternator to convert mechanical energy into electrical energy through magnetic induction. Can someone explain maxi fuse's for me? I just put in a cs-144 (140 amp) alternator. SO I would go with a 300A fuse there. 4 120 300824 Members Posted May 7, 2016 you fuse for the wire use ofc wire or welding wire. you can run it right to the battery im pretty sure. It's kind of hard to imagine a scenario where you will actually be seeing the alt put out all 140 amps, but you can bet it will happen at an inconvenient time to blow a fuse or a breaker. Right now i have a 100 amp alternator i will upgrade to a 200 down the road sometime. I changed the wiring and the volt meter doesn't drop now. The fuse should be in excess of the alternator draw to prevent nuisance fuse blowing,like an 80 amp fuse for a 60 amp generator or alternator. Most stock alternators are in the 80-120 ampere range and can only supply about 40% to 50% of that for non-automotive uses like amplifiers. Fuse size for 4 gauge wire & a 130 -150 amp alternator is 125-150 amp. Here's a parts list for the wire & other items See WWW. So divide the power rating by %efficiency first, before performing the overall division. I noticed the Proof of Performance tag rates the output at 2400 RPMs. So for one, definately do not use a fuse with any higher than a 300A rating. Normally you use one 2 auto gauge sizes smaller than the cable. 100 amps is 40% below the rated output so I would do it. Delco has a CS-144 series alternator, which has 140 Amp output. I mean, batteries have way more Amp's in them then the Alternator is giving back to it to charge it right ??. 14 gauge = 32 amps Same with a circuit breaker they are designed to trip at 80% of their rating. The chart below charts the gauge wire required based on alternator amperage output and length of wire. Also, look at the wire size for your alt output lead. What size fuse for a 2000 Watt amp? With a 14 V. How do you pick the right size for your van? Sizing a DC-DC Charger When selecting a DC-DC charger, you want to size it based on the charge rate of your aux batteries. Alternator Ground:Many mounting brackets are powder/clear coated, painted, or plated. The largest is always better (although clunky in appearance) for minimal resistance for alternators putting out more than 100 amps. Under NORMAL circumstances you will never have a problem with the 10 ga wire and a 140 amp alternator as long as the battery you have installed is not larger than stock AND it stays charged. I am wondering what size fuse do i use from the alternator to the battery and then the battery to the amp? all wire is zero gauge and big 3. GM does not have generators in their vehicles but if it was a 1961 rolls Royce like I worked on today now that has a generator. I have a 200 amp. But if you were to insist on installing one, I'd go for nothing smaller than a 180 amp. HIGH AMPERAGE ALTERNATOR KIT (140-190 AMPS) This alternator kit provides necessary components needed when upgrading your vehicle’s charging system with a. The only thing required to hook it up is a charge wire from the battery terminal on the alternator to the positive terminal on the battery-your stock wiring harnesses can just be secured out of the way. 5A 10A 15A 20A 25A 30AMP/ATC/ATO) 3,006 1K+ viewed in past week $997 - $1199 FREE delivery EAPP Compatible Replacement 180 amp Battery Fuse p/n 18790-01319 1879001319 97 $1840. These alternators also typically come with. the code for 140 amp is KG9. Also, if it's one of those alternators that was wound up to 140. (See photo - blue arrows - not all release clips shown in this picture) Doing this will allow the top of the fuse box to move out of the way. It's possible, then, that the 5 gauge wire will heat up and possibly catch on fire before the fuse blows. This Powermaster 140 amp alternator (PWM-8-57140) comes with a unique one wire regulator to make installation easy. Delco has a CS-144 series alternator, which has 140 Amp output. or a circuit breaker if you have room, lots easier to reset than take off cover and replace fuse. However, building codes to not apply to vehicles. How many amps can a 60 amp breaker handle?. Fuse size for 4 gauge wire & a 130 -150 amp alternator is 125-150 amp. There are two ways to choose a fuse size: Use the manufacturer’s recommended fuse size Calculate the fuse size yourself Let’s look at an example for each scenario. - one fuse right where the chassis wiring harness get's it's power. 150 ma is the filiment current in the bulb that will excite the alternator to charge. Scott To go one step further, as I am sure Scott did, you want to use a fuse that is rated for the weakest link in the system (which can be the rating of the alternator-to-solenoid cable). NOTE: you’ll need to account for the fact that no amp is 100% efficient. Make sure that the ground only goes to ground. It's kind of hard to imagine a scenario where you will actually be seeing the alt put out all 140 amps, but you can bet it will happen at an inconvenient time to blow a fuse or a breaker. upgraded wire running from alt to battery which had a 120amp fuse in it. A 14 gauge fusible link is designed to blow at 80% of a wires max amps of the same gauge. If the wire between the alt and the fuse going to the battery hits ground then the amperage would spike and blow the fuse before it got to the battery. Those of you without the 130 amp alternator will not have to worry as much. com for the fuse &. Most factory alternators are rated at 65 to 100 amps and are capable of handling your vehicle’s basic necessities, such as headlights, gauges, fuel pumps, A/C, etc. Most applications will never see amps that high nor are most alternators capable of putting out that many amps. 2/0 wire with 105°C insulation under 50 feet in length is capable of handling currents of up to 330 amps. A 250 or 300 ampere aftermarket high output alternator should provide enough power for all your car's systems and your high-powered stereo too. HIGH AMPERAGE ALTERNATOR KIT (140-190 AMPS) This alternator kit provides necessary components needed when upgrading your vehicle's charging system with a larger amperage alternator. Between your alternator and battery, keep it between 300A and the max output of your alternator. com for the fuse & fuse holder. and the amp will be a DC 3. You can bypass it with a cable (4 gauge or so) directly from the battery positive terminal to the alternator batt + terminal. a 60A DC-DC charger, or a 140A battery isolator). Fuse size for 4 gauge wire & a 130 -150 amp alternator is 125-150 amp. Stock is a 10ga wire with a 14 ga fuse link wire. The rating may not reflect the size if the efficiency is better on one than the other (Full spec sheet needed) If the small one excites the alternator, give it a whirl. So for one, definately do not use a fuse with any higher than a 300A rating.