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ac electrical question
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<blockquote data-quote="patooyee" data-source="post: 388540" data-attributes="member: 483"><p>This is finally coming to an end result.</p><p></p><p>My 100 amp service and the unused meter's service both have a 2-ga aluminum cable feeding to the fuse boxes. Going by NEC table 301-16 that means the max amps I can pull is about 100. The weird thing is that from the fuse box to my breaker box it is all 4-ga al and the other box is all 2-ga al. That means technically the cable in my shop is not rated for the service, yet it does fine. I found this funny since my service powers my massive shop and office whereas the other one powers an office the size of a small closet. So rather than trying to tax my tiny 4-ga wires with even more amps than they are already feeding, I am having the unused meter activated. This is convenient because its 2-ga cable actually runs through my shop right where I want the welder service at. The plan is to replace my 100-amp fuses at the meter with 150, install a breaker box inside that is fed through a 125-amp breaker which will feed the welder. Yes, I know technically the cable is not rated for that mush, but it seems there is a large safety factor built into those ratings based on my shop's service cable.</p><p></p><p>Even so, I still won't be able to feed the welder everything it wants, but it will be enough for me. There is also a power factor correction capacitor set for the welder that brings max draw down to 125 amps should I ever want it.</p></blockquote><p></p>
[QUOTE="patooyee, post: 388540, member: 483"] This is finally coming to an end result. My 100 amp service and the unused meter's service both have a 2-ga aluminum cable feeding to the fuse boxes. Going by NEC table 301-16 that means the max amps I can pull is about 100. The weird thing is that from the fuse box to my breaker box it is all 4-ga al and the other box is all 2-ga al. That means technically the cable in my shop is not rated for the service, yet it does fine. I found this funny since my service powers my massive shop and office whereas the other one powers an office the size of a small closet. So rather than trying to tax my tiny 4-ga wires with even more amps than they are already feeding, I am having the unused meter activated. This is convenient because its 2-ga cable actually runs through my shop right where I want the welder service at. The plan is to replace my 100-amp fuses at the meter with 150, install a breaker box inside that is fed through a 125-amp breaker which will feed the welder. Yes, I know technically the cable is not rated for that mush, but it seems there is a large safety factor built into those ratings based on my shop's service cable. Even so, I still won't be able to feed the welder everything it wants, but it will be enough for me. There is also a power factor correction capacitor set for the welder that brings max draw down to 125 amps should I ever want it. [/QUOTE]
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