Reply to thread

Message

<blockquote data-quote="PlumbBill" data-source="post: 7624541" data-attributes="member: 639145">Let&#039;s start off with powering that amp.YES you need a fuse at the battery, not to protect the amp, but to protect the wire &amp;amp; your vehicle.Without looking up the specs of that amp the simple rule is the fuse at the battery needs to be equal to the sum of all fuses on the amp.In your case a 50 amp fuse (2x25).If you are running 50 amps @ 25 feet you will need a bigger wire than 8 awg.8 awg is rated for more than 50 amps at a short distance.You need to find what the amp is drawing, to find what gauge would be acceptable.@ 25&#039; 8 awg up to 20 amps, 6 awg up to 35 amps, 4 awg up to 50 amps, 2 awg to 65 amps &amp;amp; 0 awg for 125 amps.That info is from IASCA &amp;amp; yes they do oversize a bit.NEC code rates 8 awg @ 70 amps-- 70 degrees THWN.</blockquote>

[QUOTE="PlumbBill, post: 7624541, member: 639145"] Let's start off with powering that amp. YES you need a fuse at the battery, not to protect the amp, but to protect the wire & your vehicle. Without looking up the specs of that amp the simple rule is the fuse at the battery needs to be equal to the sum of all fuses on the amp. In your case a 50 amp fuse (2x25). If you are running 50 amps @ 25 feet you will need a bigger wire than 8 awg. 8 awg is rated for more than 50 amps at a short distance. You need to find what the amp is drawing, to find what gauge would be acceptable. @ 25' 8 awg up to 20 amps, 6 awg up to 35 amps, 4 awg up to 50 amps, 2 awg to 65 amps & 0 awg for 125 amps. That info is from IASCA & yes they do oversize a bit. NEC code rates 8 awg @ 70 amps-- 70 degrees THWN. [/QUOTE]

Verification