100 Amp Service

[s1nemesis1s]

Hello all,

I am looking to run 1.5 conduit underground 100 feet to my garage. I want 100 amps of electrical service - 2-2-2-4 wire URD or should I look at copper? WOuld copper 4-4-4-6 support it?

I am not worried about code because I am away from all that - but I don't want to burn my house down.

 

[norcal]

You will need to find the article in the NEC which you should know is article 250 of the NEC

See 250.32(A)

 

[Megawatt]

See 250.32(A)

Your close but read the exception to that particular article. That’s why I say pull 4 wires with one of them being the grounding conductor from the main panel. Think about it you don’t need ground rods at the building because you already have it through your equipment ground.

 

[norcal]

The exception is for a single branch circuit, including a multiwire branch circuit, a feeder still requires a electrode. The exception makes sense when you want to have a 20A circuit to a shed for a light, and/or receptacle(s), for example. Unless somebody was under a very old NEC, a 4-wire feeder is required, code permission for 3-wire feeders is long gone & a grounding electrode is still required for a separate structure unless a single branch circuit.

 

[Megawatt]

The exception is for a single branch circuit, including a multiwire branch circuit, a feeder still requires a electrode. The exception makes sense when you want to have a 20A circuit to a shed for a light, and/or receptacle(s), for example. Unless somebody was under a very old NEC, a 4-wire feeder is required, code permission for 3-wire feeders is long gone & a grounding electrode is still required for a separate structure unless a single branch circuit.

I can tell that you haven’t dealt with any inspectors. I’ve wired many buildings and garages and I have never drove a ground rod at any of them and I haven’t felled inspection. Let’s move on and quit arguing and we will agree to disagree