100 amp sub panel?

[clayton]

residential. feed to 100amp subpanel, (or whatever you want to call it), any problems with feeding this panel with say, use or uf? do they make a romex in #4awg?? reason was wanting to avoid conduit if possible.

thanks
clayton

 

[Tiger Electrical]

Real electricians use conduit.

Dave

 

[mdshunk]

I don't know if they make romex or UF that big, but SER would be the typical choice if a cable method is desired.

 

[360Youth]

Real electricians use conduit.

Dave

Where in the world does that come from?? I've pulled a lot of real NM in a whole lot of real homes. I'm tempted to make a new thread out of that statement alone.

To answer the OP, 100 amp SER would be fine. Skip the UF, IMO, in such an application. Make sure you check '08 NEC if it applies. Rules have changed regarding residential feeders.

 

[Cavie]

Real electricians use conduit.

Dave

Guess I've fooled a lot of people in 38 years!!:grin:

 

[clayton]

thanks for your answers,
now, personal preferance, #4 or #2?? what would you do and why??


i think personally i like conduit, it is a fine and code compliable installation, but so are various other wiring assemblies, and any real electrician should be willing to admit that, even if they prefer one over the other.

thanks again.

 

[quogueelectric]

yes they make a romex

yes they make a romex

residential. feed to 100amp subpanel, (or whatever you want to call it), any problems with feeding this panel with say, use or uf? do they make a romex in #4awg?? reason was wanting to avoid conduit if possible.

thanks
clayton

But you would have to go with a #3 or #2 to safely carry 100 amps. The number 4 is a residential service exception for services only.

 

[iwire]

Real electricians use conduit.

Dave

Yeah, that makes sense. :roll:

 

[iwire]

thanks for your answers,
now, personal preference, #4 or #2?? what would you do and why??

3 copper or 1 Aluminum would be the smallest legal sizes for a 100 amp sub panel. (Unless the service entrance conductors are smaller)

 

[chris kennedy]

Real electricians use conduit.

Dave

Look where Dave lives.

 

[iwire]

Look where Dave lives.

I 'know' Dave and I did know where he lives, his answer is still rude.

There are millions of "real electrians" that have never picked up a bender.

 

[Dennis Alwon]

Depending on the load of the subpanel, you can use #4 and use a 90 amp CB. That will save you some money.

I would use ser cable copper because the cable is rated 90C .. NM cable must be used at 60C

 

[CBL]

.
Make sure you check '08 NEC if it applies. Rules have changed regarding residential feeders.

You say check the '08 NEC...Are any states already using the '08? I thought most moved up to '05 at the beginning of the year...Thanks

 

[Dennis Alwon]

You say check the '08 NEC...Are any states already using the '08? I thought most moved up to '05 at the beginning of the year...Thanks

NC will be using 08 on June 1. I believe most states are using the 05 for years.

 

[CBL]

NC will be using 08 on June 1. I believe most states are using the 05 for years.

Thanks, I thought that most were on '05 and I just bought the 2005 NEC Code book and 2005 Handbook. Thanks

 

[Tiger Electrical]

The conduit remark was a joke because IMO it's dangerous to give advice to someone who asks if it's OK to run 4 ga UF for a 100-amp subpanel. Real electricians don't need to bend conduit, but they do need to read ampacity tables.

Dave

 

[Cavie]

The conduit remark was a joke because IMO it's dangerous to give advice to someone who asks if it's OK to run 4 ga UF for a 100-amp subpanel. Real electricians don't need to bend conduit, but they do need to read ampacity tables.

Dave

Where I come from, #4 would be just fine in the Sub panel. #4 is allowed for the service and it would be a waist of money to require the sub panel feeders to be larger than the service wires. Think about it. What would be the benifit?

 

[peter d]

Real electricians use conduit.

Darn, where do I turn in my license? :roll:

 

[360Youth]

The conduit remark was a joke because IMO it's dangerous to give advice to someone who asks if it's OK to run 4 ga UF for a 100-amp subpanel. Real electricians don't need to bend conduit, but they do need to read ampacity tables.

Dave

I'd rather they ask here or somewhere than do it wrong in the field. His questions seem a little rookie-ish, but I'll moderators sort that out.

 

[360Youth]

You say check the '08 NEC...Are any states already using the '08? I thought most moved up to '05 at the beginning of the year...Thanks

It's already been adressed, but I just was advising checking your local adoption. It does not matter what NC or MA is using, only where you are. I talked to some friends in MD over the weekend and I think she said DC is still on '99 or '02.