Skip to main content

New answers tagged

1 vote

Exterior 125A subpanel for pedestal selection

A few things to consider: Anything outdoor-rated should be OK. That being said, I am not so sure (one of the professionals may have a definitive answer) whether a panel on a pedestal is normally ...
manassehkatz-Moving 2 Codidact's user avatar
2 votes

Main panel replacement without upgrade

Not directly. A 200A panel itself is OK, but you will need 100A protection to limit the current through the meter and the service drop. The main breaker will need to be replaced with a 100A (if even ...
NoSparksPlease's user avatar
3 votes

Main panel replacement without upgrade

Big panels and smaller main breakers is okay. Panels are usually up to rating/do not go over. The why you need to change might be important. Breakers are usually matched to panels/panels only take ...
crip659's user avatar
  • 24.8k
-1 votes

Two main panels? One generator to power them all!

Running two electrically isolated circuit breaker subpanels from one generator is absolutely do-able, provided your power plan calculation doesn't exceed the output from the generator. You'll need to ...
Will Diederich's user avatar
1 vote
Accepted

Need to power 800 sf tiny house 350 feet from transformer

Using the Southwire Voltage Drop Calculator and 350 feet, 1/0 aluminum wire, 240V and 70A, the result is 4.25% drop. That's not too bad. However, at 120V it is 8.50%. So a key issue is 120V vs. 240V ...
manassehkatz-Moving 2 Codidact's user avatar
3 votes
Accepted

What kind of step down transformer should I use at my pump?

Yes that transformer linked in your edit looks like a good choice. Page 4 of the data sheet illustrates that you'd install a jumper wire between H1 and H3, a separate jumper between H2 and H4, and ...
Greg Hill's user avatar
  • 30.8k
5 votes

How to make a 150a sub panel work with a 200a main panel when the max breaker size if 125a

You said "I know that to pass inspection, the breaker feeding my subpanel needs to match or exceed the amp rating of the subpanel itself." Not true. The feed breaker's purpose is to protect ...
ArchonOSX's user avatar
  • 20k
2 votes

Can I add another ground bar to my old Crouse-Hinds main panel?

This appears to be quite an old panel. This one was manufactured with a single ground / neutral bar. I can't see in your photo, but if it is mounted on an insulating material there should be a green ...
ArchonOSX's user avatar
  • 20k
1 vote

Can I add another ground bar to my old Crouse-Hinds main panel?

The main panel is the one place where neutral and ground must be bonded together. So it is allowed to have just one common busbar for neutral and ground. Yes if you can find the manufacturer of your ...
ratchet freak's user avatar
8 votes
Accepted

How to make a 150a sub panel work with a 200a main panel when the max breaker size if 125a

I know that to pass inspection, the breaker feeding my subpanel needs to match or exceed the amp rating of the subpanel itself. This is incorrect "knowledge" and it is exactly the wrong way ...
Bart van Ingen Schenau's user avatar
6 votes

How to make a 150a sub panel work with a 200a main panel when the max breaker size if 125a

Actually, this is wrong. If the sub panel has its own main breaker, than it can be higher, lower or the same amperage as the feed breaker in the main panel. The feed breaker protects the feed wires ...
DoxyLover's user avatar
  • 12.7k
3 votes

Can I remove the pigtails on an AFCI breaker if I have a panel that supports plug-on-neutral?

The advice here is no different from "I have a wire I don't think I need. Should I just cut it off?" One would never cut off a wire in any case. Because first, you would need to terminate it ...
Harper - Reinstate Monica's user avatar
16 votes

Can I remove the pigtails on an AFCI breaker if I have a panel that supports plug-on-neutral?

Pigtail breakers don't have contacts for PON panels, so you have to use the pigtail to connect neutral. Or return them and get the correct PON breakers for your panel. Always wire the neutral pigtail ...
Ecnerwal's user avatar
  • 217k
9 votes

Can I remove the pigtails on an AFCI breaker if I have a panel that supports plug-on-neutral?

NO! - it's very important to connect the pigtail to neutral bar where you removed the original neutral wire. The electricity needs a path back to neutral. If you only connected the white neutral wire ...
DJ.'s user avatar
  • 876
-2 votes

Generally speaking, when is it necessary to install a sub-panel for providing electricity to an outside shed/office?

You would need a minimum of 2 circuits period, anything heat or a/c would involved require a 2-pole 240v circuit, likely #10 (min) wire, separate from any lighting or recep circuit… Depending on the ...
Michael Culivan Jr's user avatar
0 votes

Is it possible that a 240V wall heater is connected to one breaker?

Many older 240V devices only have two wires. Today they would have 3 with the 3rd one being a ground lead. There is no need for the NEUTRAL for things like your electric hot water heater and so only ...
jwh20's user avatar
  • 23.4k
1 vote
Accepted

Old house, difficult panel, new circuit question

I'm going to post this as an answer as no further ideas appear forthcoming. The question I asked related to how I could get a 60a run from the panel when I could not use conduit, and do so in the ...
Linwood's user avatar
  • 285
0 votes

Old house, difficult panel, new circuit question

Rule of Six Panel In ye olden times, service sizes were increasing to 100A or more, but large main breakers were relatively expensive. As a partial workaround, the NEC includes Rule of Six. This means ...
manassehkatz-Moving 2 Codidact's user avatar
1 vote

Electrical problem with front porch light not working

power to the switch but not to the fixture Most likely problems are loose or damaged wire splices at the light, or at the switch. So the first step is to remove the light and check for voltage at ...
Robert Chapin's user avatar
5 votes
Accepted

How do I know how many breakers I can put into my main panel?

Yes, that's fine. This is a sub-panel and the 100A breaker must be elsewhere, perhaps outside near the meter. Equal to or greater than the rating is fine for any sub-panel. In the unlikely event that ...
Ecnerwal's user avatar
  • 217k
1 vote

Installing a subpanel with a service entry cable feed-through a Powerwall subpanel

Answering my own question with details on the installation such as changes I made and pictures with the different steps. Some changes from the original plan were to use 2/0 XHHW wire instead of SER ...
user2558617's user avatar
4 votes
Accepted

using load center ground bars for neutrals

Neutral differs from ground in that neutral carries ordinary service currents at full ampacity at any time. Whereas ground only carries current during a ground fault, which should hopefully end quite ...
Harper - Reinstate Monica's user avatar
2 votes

Can I add a breaker to this panel without violating the Rule of Six?

Here's the thing with Rule of Six panels. The sum of the breakers is allowed to exceed the size of the service. However, the loads are not allowed to exceed the service! So you must do a thing called ...
Harper - Reinstate Monica's user avatar
0 votes

400A PV Meter/Main as 200A

Ok so your house's service load calculation is <= 200A. You want to install up to 200A of solar, and have that be usable in an off-grid mode very important part there that "flips the table&...
Harper - Reinstate Monica's user avatar
0 votes

What is the purpose of the twin single pole breaker?

A normal US residential supply has two hot lines (sometimes called "legs"), which are 180 degrees out of phase with each other. If you connect a load between one leg and neutral you get 120V....
Peter Green's user avatar
  • 5,104

Top 50 recent answers are included