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Results tagged with subpanel
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user 18763
For questions about an [electrical-panel] that is fed from another [electrical-panel] instead of being fed directly by a utility service or separately derived service (such as a generator or inverter).
1
vote
wire size for a 150 amp sub panel from a 150 amp breaker added to a 400 amp main panel
The deration of 90° wire is sound engineering since the terminations are not rated for 90°C you cannot use the wire at that rating. However, you can use that rating to start the deration process for a …
- 20.6k
1
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Can I run copper wire to a subpanel via the crawl space without conduit?
From the 2011 NEC 310.15(B)(7) table.
A 100 amp residential panel only requires #4 copper or #2 aluminum.
3/0 copper would be a waste of money.
If you use SE cable you will need 3 insulated conducto …
- 20.6k
1
vote
What size wire for two 100 amp sub panels?
20 feet is a short run and voltage drop is not a problem in that short of a distance.
Running 2 - 100 amp sub-panels you should run #3 THHN wire to each panel with a 100 amp breaker to feed each one …
- 20.6k
0
votes
Adding a sub panel in my basement
If I ran the cable between the next set of 2x4’s, is it okay by code to run the cable though the 2x4 above the main panel the have it come through the top of the main panel, is that okay.
Yes, th …
- 20.6k
2
votes
Outlet tester shows "bad ground"
If you only have a three wire feed to the barn then the panel should have the neutral and ground connected together.
The old method of wiring a sub-panel in a separate building was the 3-wire method l …
- 20.6k
1
vote
Wiring second breaker panel
If the house is detached you still need ground rods or a concrete encased electrode. You didn't answer ThreePhaseEel's second question.
Either way, The ground wire gets attached to the ground bar. A …
- 20.6k
1
vote
Installing sub-panel, plus hot tub to new sub
Number 6 AWG can be protected at 70 amps if the equipment at both ends is rated for 75°C yes to your wire colors.
Yes
If the new sub is attached to the main or right next to it, it does not need a gr …
- 20.6k
4
votes
Wiring up a subpanel in attached workshop
I don't quite understand why I need to separate the ground and neutral at the subpanel. … My main panel has the two bonded, so my neutral at my subpanel will still be grounded since it's grounded at the main panel. Can someone explain why this is necessary, just to satisfy my curiosity? …
- 20.6k
1
vote
Ground rod for detached sub panel
You didn't say where you live, but the National Electrical Code applies to most areas of the USA. Check your state and local codes for any modification to this. The NEC is clear on this subject.
If th …
- 20.6k
4
votes
Does the bare wire in an 8/2 cable connect to neutral or ground at my sub-panel?
The current National Electrical Code that most jurisdictions employ will no longer allow a 3 wire sub-panel feed.
4 wire feeders are now required for sub panels. Two hot legs, a neutral, and an equipm …
- 20.6k
2
votes
Can I install this array of circuit breakers in my sub-panel?
Short answer: yes for the branch circuits, no for the feeder.
The capacity of the sub panel is a total of 30 amps of load NOT the sum of the breakers. As long as the total of all of your equipment d …
- 20.6k
1
vote
What size wire and subpanel for a pergola with an outdoor kitchen?
You should really have done this calculation before installing the conduit but a 1" will be sufficient for what you want to do.
The answer is: the sub-panel needs to be sized large enough to carry th …
- 20.6k
0
votes
Do I need to run a ground from my main panel to the new sub panel 100' away?
The "Ufer" ground can be used as the grounding electrode at a second building but it does not replace the requirement to run a separate equipment ground to the sub panel.
If the two panels are in th …
- 20.6k
2
votes
How should I add 120V service to an outbuilding?
My question is can I run 10/2 using the ground as neutral/ground or do I need to run 10/3 2 hots neutral and ground?
You can use #12/3 for a multiwire circuit (a circuit with two hots and a neutr …
- 20.6k
0
votes
Can I run a ground wire along the outside of conduit?
Yes, you can run an external equipment ground wire.
But my question is....why do you want to?
If the sub-panel was installed years ago under a previous Code then it is grandfathered and does not nee …
- 20.6k