Linked Questions

1
vote
1answer
59k views

What size wire for 100 amp sub-panel from a 200amp main panel? [duplicate]

I want to add a 100 amp sub-panel from a 200 amp main in an attached garage. It will be about 100 feet from sub to main. What gauge wire should I use? The sub panel is to hook up a 7.5 horse air ...
0
votes
0answers
467 views

What size wire do I need for a 100A subpanel? [duplicate]

I'm installing 200 amp service in a shop, and I am going to feed my house with a 100 amp sub panel. I want to use aluminum wire for this run. What gauge of wire I should use?
0
votes
1answer
360 views

Subpanel run to secondary floor apartment from basement [duplicate]

What size wire would I need to run a 100 amp subpanel 28 feet away? I have 6/3 wire would that do it?
0
votes
1answer
46 views

100A sub panel from 150A Service at Body shop [duplicate]

I'm running 100' away from 150A main Service panel to 100A sub panel, my question is: what wire gage shoul I use? Thanks
11
votes
1answer
153k views

What size wire should I use to feed a subpanel in my garage?

My main panel has been upgraded to 100 amps. I would like to add a subpanel in the garage which would supply: 20 amp Mig welder running on 120 volts, but later upgrade to a larger Mig welder as i ...
4
votes
3answers
54k views

Need advice on connecting 100 amp sub-panel to 200 amp main panel

I currently have a 200 amp main panel that is full. I'm planning on installing some equipment for a water well pump, water softner, etc. and it seems to make sense at this point to install a sub-...
4
votes
3answers
36k views

What type of wire should I use to feed a 70 ampere subpanel?

Finishing a basement and I need to add a subpanel. Main panel is outside. Subpanel will be in the basement. 70 Amp breaker in the main to feed the subpanel. I was thinking THHN but would this mean ...
3
votes
2answers
50k views

Wire Gauge/Type for 100amp detached Shop?

I have a new woodworking shop that I built behind my house. The shop has a 100 Amp panel and I have wire the shop for 110v/20a plugs and 220v/20a plugs. My house has a 225amp service and already has a ...
5
votes
3answers
8k views

Do I need to derate wire ampacity for two or more sets of wires in the same raceway for subpanel wiring?

I was planning to pull three sets of four conductors (3 AWG wire) through 2" EMT conduit for a 30' length that is common to all three sets of wires, and then branch off at a listed metal junction box (...
4
votes
4answers
1k views

Wiring up a subpanel in attached workshop

I need to wire up my attached workshop, which is about 50' from the main panel. I don't want to make a bunch of homeruns and would rather install a workshop-specific panel for this task. I will be ...
1
vote
0answers
42k views

What size wire do I need for a 100amp underground 300 ft run?

I want to put in a 100amp subpanel in my garage. The run will be underground and 300ft long. I have a Siemens panel with breakers rated at 60/75 deg C. What is the proper wire size I need? I was ...
3
votes
3answers
20k views

What size wire for two 100 amp sub panels?

I am running two 100 amp sub panels from a 200 amp service. My question is the wire size. I have seen the chart via The NEC provides wire sizing based on the type to be used and the application. I ...
1
vote
1answer
10k views

How to determine what type and gauge of wire should used for underground wiring to a detached subpanel?

I Will be installing a subpanel in a detached garage. The subpanel will be 60 amp. The garage is about 30' from the main-panel in-house, and I will of course get an exact length before selecting the ...
3
votes
2answers
6k views

Is a conduit required or recommended when running SER wire in unfinished space?

I'm planning on installing a 100amp sub panel in the garage. The garage is right around the corner from the main load center in the basement, but part for that path goes through the stairway from the ...
4
votes
1answer
4k views

How do I convert an existing electrical panel to a subpanel?

I'm going to upgrade my existing electrical service from 100 amps to 200 amps. Along with the service upgrade, I'll be moving the location of the service drop (part of a larger home remodel). I want ...

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