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13 votes

Help me understand what happened and how the machine left works

Likely a transformer, or autotransformer (or it could be an inverter, with current tech) making a new neutral, so the problem becomes fix when convenient rather than Fix immediately. Just need to ...
Ecnerwal's user avatar
  • 220k
10 votes

Are the NEMA 10-30 to 14-30 adapters with the extra ground wire valid/legal to use and still adhere to code?

Don't buy electrical gear via mail order Absolutely not. Dangerous rubbish. You can tell from the obviously Photoshopped spiral on the ground lead, and the use of a "banana plug" on the end ...
Harper - Reinstate Monica's user avatar
9 votes

Are the NEMA 10-30 to 14-30 adapters with the extra ground wire valid/legal to use and still adhere to code?

Amazon sells stuff all over the world from vendors all over the world so what's legal elsewhere might not be legal here in the USA. In the USA, it would have to be UL listed to be used. You'd have to ...
JACK's user avatar
  • 82.3k
8 votes
Accepted

Is it required to connect ground wire to light switch?

Since you have a plastic box, an explicit ground wire connection is required. With a metallic box it's generally not, for switches, as they can ground by connection to the metal box, which should be ...
Ecnerwal's user avatar
  • 220k
8 votes

New installation Shower room has sewer smell. Flushing toilet causes gurgling & vacuum in shower drain

Sounds like there's a missing vent or a clogged vent between the toilet and the shower. Flushing the toilet sucks the water out of the shower trap and allows sewer gas to enter through the shower. If ...
JACK's user avatar
  • 82.3k
7 votes

How to ground 240v generator

STOP BEFORE YOU KILL YOURSELF AND THE UTILITY LINEMEN In order to use a portable generator to power your house in a blackout you need two key things: Inlet You are trying to connect to an outlet. That ...
manassehkatz-Moving 2 Codidact's user avatar
6 votes

How do I figure out why I have current on electrical panel ground line?

Is there any way to isolate the source of the problem so I know who to call? If you're not going to try to DIY this, call an electrician. No further information is required. If you were having the ...
nobody's user avatar
  • 6,777
5 votes

How does lightning get to your ground rods directly without first traveling through your electrical system and then back through neutral/ground?

The neutral or ground is the top wire on the pole. The lightning also has a very low impedance path from a hot wire to neutral - the utility's transformer. For how transformers deliver power to houses,...
Harper - Reinstate Monica's user avatar
3 votes

How do I figure out why I have current on electrical panel ground line?

Electrician has a lot of work to do as the problem turned out to be multiple issues. Almost every connection in the main panels was loose, with a few burned wires as a result. The ATS suffered from a ...
clairefromperth's user avatar
3 votes

Kenmore double oven door has 120v at the handle

Turn the oven breaker OFF until it is fixed. This is the standard failure mode of "3-wire" dryers and ranges when the neutral wire breaks. The chassis is electrified, and it kills someone. ...
Harper - Reinstate Monica's user avatar
3 votes

Is my understanding of why ground is bonded to neutral (vs not being bonded at all) on a 3 prong dryer connection correct?

Yeah, that's probably about right. The rationale in 1965 was that the circuits and sockets are rarely disturbed so a problem with the neutral wire is unlikely. The funerals, often with little caskets,...
Harper - Reinstate Monica's user avatar
3 votes

Updating old 2 prong outlets to GFCI

You don't need an electrician if you have basic electrical skills. Code allows for old , non-grounded to be substituted with GFCI outlets provided you put a tiny little sticker on them and all ...
George Anderson's user avatar
3 votes

Can flexible conduit be used inside PVC conduit?

Can you? Yes, if the PVC is big enough to get the Liquid Tight through it. (It'll need to be REALLY big to get that through there!) The real question is: why would you want to? You will not be ...
FreeMan's user avatar
  • 47.5k
2 votes

Provide another example in which a metal appliance can become energized besides the hot wire coming in contact with the metal frame of the appliance

There have been cases where guitarists in particular have succumbed to a similar situation. The three-pin plugs (UK style) have the earth on the pin furthest away from the strain relief, where the ...
Tim's user avatar
  • 5,298
2 votes

Updating old 2 prong outlets to GFCI

Those 3-light testers are not able to test GFCIs if there's not a valid ground. This is normal.
Harper - Reinstate Monica's user avatar
2 votes

Updating old 2 prong outlets to GFCI

That's acceptable. If you can't actually install a ground, a GFCI is the recommended safety precaution, providing much of the same protection (and arguably a bit better).
keshlam's user avatar
  • 30.4k
2 votes

solar installation, going from enphase combiner box to the disconnect switch do I need to run a ground,

There's no use whatsoever for neutral from the panel through the disconnect to the combiner, unless something in the combiner box needs neutral. Neutral is not ground. Anything you've seen that makes ...
Harper - Reinstate Monica's user avatar
2 votes
Accepted

45 Volts between Hot and Metal Pipe : GFCI

In my neck of the woods (Washington state), all metal piping, such as the hot water line from the water heater, the cold water line, any gas lines need to connected with a run to the grounding bus bar ...
George Anderson's user avatar
2 votes

45 Volts between Hot and Metal Pipe : GFCI

Those readings are what I would expect from water pipes that have a poor or no ground connection. In the old days, connecting to a water pipe was the thing to do but now there are driven ground rods. ...
JACK's user avatar
  • 82.3k
2 votes

Pool table light

You need to replace the entire cable with a three-wire lamp cord including ground, and buy a three-prong plug for it. Hopefully you can easily get access to the clam-shaped box that the wires enter ...
jay613's user avatar
  • 40.6k
2 votes

Can I safely remove existing ground wire from neutral/ground buss in service panel?

If the existing ground wire is truly a ground wire - not connected to anything it shouldn't be connected to - then it is 100% safe to remove and replace it with the main power on. But really there are ...
manassehkatz-Moving 2 Codidact's user avatar
1 vote

Help me understand what happened and how the machine left works

What happened: search for past answers with the phrase "lost neutral"; it's been described in some depth at this point. Re what the machine is: could be anything from transformer to motor-...
keshlam's user avatar
  • 30.4k
1 vote

Pool table light

Whoa! Few issues here. First, the ribbed wire (in the zip cord) is the neutral white wire. The smooth wire is the black hot wire. The batter ground wire should be threaded thru the chain with the ...
Keith's user avatar
  • 1,075
1 vote

Installing new light fixture: unsure of multiple ground wires

Ground wires are always connected together, either by wire nuts or with screws in metal(using the metal as a path). If the ceiling box is metal, then it should have a ground screw also. If plastic, ...
crip659's user avatar
  • 25.7k
1 vote

Can I run hot tub wiring above ground, just below a ground level deck? Or does it need to be visible?

Your inspector might need to see the conduit as part of the inspection. Apart from that, you're welcome to run it under a deck, or even underground if you use the appropriate wire inside it. Since you'...
KMJ's user avatar
  • 12.1k
1 vote

Can I safely remove existing ground wire from neutral/ground buss in service panel?

It is always a good idea to turn off the power before sticking your fingers in there. There should be a feed breaker for this panel. Turning that off should be enough, or turn off the main breaker. ...
crip659's user avatar
  • 25.7k
1 vote

Can the neutral wire be grounded at a manhole (before the service disconnect)?

I think yes, it is allowed, for both questions. For the first question, section 250.24(A)(1) of the 2020 NEC states that the service neutral wire must be be grounded anywhere between the load-end of ...
alejnavab's user avatar
  • 143
1 vote
Accepted

Junction box config question (copper wires are braided together and not attached)

First of all, the two black wires are not "hot and neutral", they are "hot and switched hot", or alternatively referred to as "line and load". Neutral is always white (...
manassehkatz-Moving 2 Codidact's user avatar
1 vote

Provide another example in which a metal appliance can become energized besides the hot wire coming in contact with the metal frame of the appliance

In Britain, some electrical systems are connected so the neutral-ground bond is in the utility line, not in the house's electrical panel. According to John Ward, author of the video "TN-C-S ...
Triplefault's user avatar
  • 8,182
1 vote

Provide another example in which a metal appliance can become energized besides the hot wire coming in contact with the metal frame of the appliance

Supply neutral becomes disconnected on a TN-C-S supply. That's one where the supplier provides a grounded (earthed) neutral, not a separate ground wire. In particular, it's a problem where the broken ...
Simon B's user avatar
  • 3,958

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