situation is as follows:
sub panel is to be 240v 100amp , approx. 25' from existing 200amp main, fed from secodairy 100 AMP BRAKER at the main breaker panel.
sub panel needs
(2) 240v circuts, (1) 1hp water pump, (1) 50amp elec. dryer
(1) 20a cir for (7) outlets, (2) w/ gfi's
(1) 15a cir for (4) 4'x (2) florecent- shop lts
feeder lines will go from main box to sub pan. via underground
plactic conduit, so my question iss - what size & type of wires are
to be installed in conduit?
2006-11-15 03:57:30 · 6 answers · asked by stringbean 1 in Home & Garden ➔ Maintenance & Repairs
You have set out your intentions very nicely.
1- If your "plastic conduit" is at least 1" Schedule 40, you can use #3 THHN AWG copper 3 legs. (mark one with white tape at both ends).
2- (Underground should be a least 24") [don't use Aluminum wire].
3- You can use #2/3 UF Romex but 1 1/4" pipe.
(I had to go 50 ft to my garage and digging the trench was the hardest). Good Luck! !
P.S. RayD is right, You'll need an 8 ft ground rod, clamp and at least #8 solid copper wire (coated or not) [half inch copper clad rod is best].
2006-11-15 04:24:10 · answer #1 · answered by norman8012003 4 · 0⤊ 0⤋
You can end up with some very serious problems by not wiring a sub panel properly.If you have a twenty and thirty ckt there will be a difference of 10 amps.If the sub panel is bonded to the neutral from the main panel, the sub panel box can be electrically live and be a very dangerous shock hazard, even if the sub is just a 120 volt system and u r pulling say 25 amps with the neutral tied to the sub panel box then yes the sub box can/will be live to ground. That is why the code says the neutral MUST be insulated/isolated from the ground or metal enclosure of the sub panel the sub panel box
2016-03-28 21:25:50 · answer #2 · answered by ? 4 · 0⤊ 0⤋
Norman is correct, but if you don't want to run it in conduit you can get #1 USE commonly called triplex(may be a little bit cheaper) it's a direct burial wire, you would although have to bury it 24" deep, you would also need to use a grounding electrode and grounding electrode conductor(ground rod and ground wire) at the sub panel you are setting even with what Norman suggested you would need this.
2006-11-15 05:28:21 · answer #3 · answered by Ray D 5 · 0⤊ 0⤋
3 #2's and 1 # 5 for ground approx. 120 ft. #2 and 40 ft. #5 all copper thhn.
2006-11-15 04:45:57 · answer #4 · answered by Anonymous · 0⤊ 1⤋
4 guage if you have an ace hardware close to you go there and tell them the situation. they will help you.
2006-11-15 04:07:41 · answer #5 · answered by Harry M 1 · 0⤊ 1⤋
Are you an electrician? My guy is a Master....I will ask him for you
2006-11-15 04:18:24 · answer #6 · answered by kmoc123 5 · 0⤊ 1⤋