Go Over or Under?

[ddawg16]

I'm in the planning stages on the 2 story addition to my house (now that the garage is done).

Because I'm building back....I'll end up having to redo all of my existing electrical to my house....currently, my 200A load center is on the side of the house and I have a conduit that goes to a junction box where it ties into my existing circuits.

Part of my addition will have a slab....it would be a much shorter shot from the new load center to the old junction box if I went underneath the slab in conduit....if I go over or to the side, besides a lot of holes, the distance is longer.

I think I already know the answer...but I thought it best to hear from the experts.

 

[mrb]

how many circuits? I dont remember the calculations off the top of my head but there is a limit (9?) to the number of current carrying conductors in a conduit before derating makes you start using larger wire. Another issue, is if you are wiring the addition in romex youre going to have to buy rolls of THWN for the underground run, so that combined with multiple conduit runs, junction boxes, and whoknowswhatelse the cost might not be bad with just going up and over.

 

[ddawg16]

5 ckts.....I'm currently feeding them 10Awg THHN.....I have a lot of THHN.

I guess the real deciding factor will be what my back wall looks like when I pull the stucco off. If the first box for each ckt is fairly close, then I might dump the junction box and run fresh romex to each of the first connections.

 

[Aceman]

5 ckts.....I'm currently feeding them 10Awg THHN.....I have a lot of THHN.

I guess the real deciding factor will be what my back wall looks like when I pull the stucco off. If the first box for each ckt is fairly close, then I might dump the junction box and run fresh romex to each of the first connections.

That would be ideal.

Otherwise, I'd probably run two 3/4's underslab from your new panel location over to the j-box.