Service Entrance Conductors

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jaselectricman

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Is there anything that would prevent me from doing the following.

I priced out a new service and bought the materials with the intention of using 2" EMT for the service mast and 2/0 Cu for the Service Entrance Conductors on a 200 Amp service. There is an existing 100 Amp service with no Conduit. SE cable is run through the back of the existing meter socket, through the wall above the sill in the basement.
It was my intent to continue my run of 2" EMT from the bottom of the meter socket through and SLB and then through the concrete foundation. I priced the job with a concrete cutting company at $225.00. The customer does not want to pay the additional charge which was not on the estimate.
Can I switch over to AL SE Cable in the meter socket to run into the house with the 2/0 Cu in the service mast? Anyone see a problem with that?
Any suggestions?
 
Re: Service Entrance Conductors

CU into top of meter, AL (4/0) out into panel right?

Just check the meter sticker to see of there's different torque specs for the different sized wire. Should be fine.
 
Re: Service Entrance Conductors

That was my thought. I don't know if you can find a 2" EMT connector listed raintight. I believe I would just use RMC.
 
Re: Service Entrance Conductors

Thanks for the replies. I have read the posts on EMT compression fittings no longer being listed as rain tight. Does that mean we can no longer use EMT for service masts? Has no one come up with a listed fitting yet?

Thanks,
Joe
 
Re: Service Entrance Conductors

Are you talking about the service riser through the roof that will support the drop wires?
You need to look at 230.28 and Even if you guy wire it I think most POCO's would not attach to it. as far as that goes I have seen EMT rust through in a mater of a few years I wouldn't want that on my house. Here we are allowed to use IMC or RMC only unless it is just under the eve with insulators mounted to the house.

[ December 22, 2003, 11:46 PM: Message edited by: hurk27 ]
 
Re: Service Entrance Conductors

If there's no need for roof penetration for clearance reasons, an ordinary strapped up SE riser is an easy way to go if acceptable in your area...and it won't trash the meter can if it ever gets torn off by something.
 
Re: Service Entrance Conductors

Wayne,
No I am not penetrating the roof or eave. It is running straight up the front of the house with no overhang. I should have gone with SE through the whole run but normally like to run conduit even if it is not required by the local inspector.
Big mistake this time.
I have never seen that problem with EMT rusting through. I decided to switch over to PVC for the mast so I don't have to eat the cost of the 2/0 Cu I purchased and I won't be violating the code with the compression fittings for the EMT.

Thanks again everyone.
 
Re: Service Entrance Conductors

As far as a listed type raintight fitting for EMT, Bridgeport has listed fittings in the 1/2, 3/4, and 1 inch size. I am sure the larger sizes are soon to follow.

Pierre
 
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