New answers tagged

0 votes

One hot leg to neutral of 4-prong dryer reading 240 volts and other hot leg to neutral reading 0 volts

I realize this is an old post but I am experiencing the issue with my old dryer power cord was wired with the neutral strap to ground, both ends of neutral under the ground screw. I got a new dryer ...
CelesteG's user avatar
2 votes

Extension Cord Coming Out of Kitchen Wall Possible NEC Code Violation

Extension cords have never been legal as installed wiring. (Sort of) good news, though. From the picture that doesn't appear to be an extension cord. Rather, it's a receptacle installed on the end of ...
KMJ's user avatar
  • 10.9k
7 votes

Can I run wires from separate panels through the same conduit?

Note that everything here assumes you are using individual wires, not cables. 12/2 and 10/3 usually refer to cables but also work as shorthand for "2 12 AWG wires plus ground" and "3 10 ...
manassehkatz-Moving 2 Codidact's user avatar
1 vote

How do I wire my new ceiling fixture?

This looks like normal old wiring for a ceiling light. You've got power coming in, and power going out and a switched hot controlled by a switch. Take your new fixture white wire and connect it to ...
JACK's user avatar
  • 79.8k
0 votes

Troubleshooting Sonoff ZBMINIL2 installation for 2-way switch integration with Home Assistant

The wiring is incorrect. The switch does not go to Live, it goes from S1 to S2. Do what you have, but take the end of the switch chain back to S1
Rohit Gupta's user avatar
  • 6,079
6 votes

Can I run wires from separate panels through the same conduit?

You can put power from two sources into a single junction box, run it through one conduit, and split it back out at another junction box elsewhere. When you do this, 312.8(A) would apply, meaning you ...
KMJ's user avatar
  • 10.9k
2 votes

Is a 60A panel enough for my workshop?

Harper's answer covers wire sizing quite well. A few additional points: Subpanel in the House Often there are ways to squeeze out another two spaces for a subpanel feed. But if not, or if adding a ...
manassehkatz-Moving 2 Codidact's user avatar
3 votes

Is a 60A panel enough for my workshop?

So, you're not allowed to run multiple circuits to an outbuilding, so that forces you into a feeder and subpanel. When someone experienced starts pricing subpanel feeder, a surprise emerges: the next ...
Harper - Reinstate Monica's user avatar
2 votes

If I split a shared neutral circuit into 2 circuits, will I avoid an overload?

The refrigerator is a negligible load. Yes I know it's 5 times larger than a microwave oven and therefore "should" take 5 times the power LOL, but no, refrigerators cheat because they are ...
Harper - Reinstate Monica's user avatar
8 votes

If I split a shared neutral circuit into 2 circuits, will I avoid an overload?

The key question is whether you have an overloaded Multi Wire Branch Circuit (MWBC) or a big dangerous mess. A MWBC uses two hot wires on different legs with a shared neutral. This gives you 20A x 2 ...
manassehkatz-Moving 2 Codidact's user avatar
7 votes
Accepted

If I split a shared neutral circuit into 2 circuits, will I avoid an overload?

Breakers trip due to load on the hot, not the neutral. Splitting a MWBC into identical but isolated circuits doesn't change anything. You need to reduce load on each circuit, so you'd have to add a ...
isherwood's user avatar
  • 135k
7 votes

Is this the correct way to replace electrical outlet with red wire

Best practice is leave it exactly the way you found it, allowing for prior nitwits. Usually, when somebody goes to the trouble of attaching two different hot wires from 2 different sources to a ...
Harper - Reinstate Monica's user avatar
2 votes

How do I fix doorbell buttons ring but do not light?

You have too many unknowns to figure this out with logic. The first question is whether your components are working and able to work together as you desire; the second is whether the wiring supports ...
MadMonty's user avatar
  • 749
4 votes

How do I wire grounded receptacles if I don't have a ground wire in the box?

You cannot install a grounded (3-prong) receptacle except one of three ways. First, you have ground wires coming in on the cables, obviously. Second, you provide GFCI protection per 406.4(D) and ...
Harper - Reinstate Monica's user avatar
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
  • 23.7k
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

converting a 10-30 receptacle to a 6-50

Based on the wiring I see, the use of a NEMA 10-30 circuit was improper, and should be immediately corrected to a NEMA 6-30. The 10-30 socket does not have ground and was outlawed in 1965. It ...
Harper - Reinstate Monica's user avatar
4 votes

Why do my kitchen circuits use a shared neutral circuit with 2 breakers and hot tabs broken?

With both breakers tied together, you would lose both circuits if one tripped. You misunderstand what the handle-ties do. Or rather, do not. An essential feature of any modern breaker is called "...
Harper - Reinstate Monica's user avatar
6 votes

Why do my kitchen circuits use a shared neutral circuit with 2 breakers and hot tabs broken?

Most MWBC's require common shutoff, not common trip As it turns out, multi-wire branch circuits generally don't (or at least aren't required to) behave as you assume. This is because while a handle-...
ThreePhaseEel's user avatar
4 votes

Why do my kitchen circuits use a shared neutral circuit with 2 breakers and hot tabs broken?

You have found what we call a 'multi wire branch circuit' or MWBC. These require a shared trip for both sides of the circuit. Without that feature, you could end up with a circuit in a dangerous ...
KMJ's user avatar
  • 10.9k
4 votes
Accepted

In-wall tube for running cables between brush-style wall plates?

Smurf tube (ENT) is the usual obvious choice. Orange less-smurfy tube if you can easily find it, but blue is fine. If you have leftover liquidtight you can use it, and I won't tell you to run ...
Ecnerwal's user avatar
  • 210k
3 votes
Accepted

converting a 10-30 receptacle to a 6-50

TL;DR Don't Install ANY Receptacle, Hardwire the EVSE I'm looking to add an EV charger by using the existing wiring. Any good quality EV charger designed for permanent installation can be hardwired. ...
manassehkatz-Moving 2 Codidact's user avatar
2 votes

Cable sizing for subpanel

Load Calculation Step 1 is to do a NEC Load Calculation to determine how much extra power you can send to the subpanel. Assuming you have 200A service and just the single 200A panel right now, you ...
manassehkatz-Moving 2 Codidact's user avatar
0 votes
Accepted

How can I connect a new thermostat wire to a furnace without terminal screws?

If it's a single zone, just splice the new thermostat's wires into the existing wires, in parallel with the old thermostat. ("Wire OR" -- if either thermostat is calling for heat, heat is on....
keshlam's user avatar
  • 28.5k
2 votes

My Room Light Switch doesn't seem to be grounded, while everything else is

Two separate issues: Metal Box A metal box can be grounded in one of two ways. If it is used with cables then the ground wire in the cable should be attached to a screw in the box. If it is used ...
manassehkatz-Moving 2 Codidact's user avatar
0 votes

Determining wire gauge based on MCA and max fuse size

When the labeling on a complex machine with its own internal fuses and breakers specifies a maximum fuse on its input, it sometimes means that if the fuse doesn't stop a short circuit as high as what ...
jb_dk's user avatar
  • 1
3 votes

How to mount a Ring flood light cam when you have no junction box and a hole with wires

What you've got right now violates code. There are some light fixtures with an integral box, but the cable here looks like the sheath is cut off way inside the wall. No good. What you should be able ...
manassehkatz-Moving 2 Codidact's user avatar
1 vote

Motion sensor with bypass switch?

Simplest way is to use a three pole - two way switch combined with a two pole single way switch. That way the two way switch controls both the single way switch and the sensors. Switch it one way for ...
Kirk's user avatar
  • 11
2 votes

Determining wire gauge based on MCA and max fuse size

The X-factor you're missing is that most motors have overload protection onboard the motor. And that works better because it can sense actual motor temperature instead of guesswork from afar. Normally ...
Harper - Reinstate Monica's user avatar
2 votes

Determining wire gauge based on MCA and max fuse size

I think what’s gotten my attention is the part where you said they ran 10AWG ROMEX to the disconnect. ROMEX isn’t suitable for outdoor use, unsupported use, etc. Replace that with an 8AWG whip of the ...
Oliver Street's user avatar
4 votes

Determining wire gauge based on MCA and max fuse size

MCA of 29.9 cannot use #10. An Air Conditioner isn't 125% because it's continuous, it's 125% because it's required in NEC 440.32(2), the Air Conditioning section. 29.9 x 1.25 = 37.375A. The best ...
NoSparksPlease's user avatar
0 votes

Determining wire gauge based on MCA and max fuse size

The manufacturer gives you a range. MCA of 29.9 means a 30A breaker is fine. So you could leave the wire alone, swap the breaker to 30A, done with the wire you have. This is the manufacturer telling ...
Ecnerwal's user avatar
  • 210k
10 votes
Accepted

How can I transition from 1" EMT to NM cable?

I think the connector you are looking for is hard to find because it isn't required. 334.15 Exposed Work. In exposed work, except as provided in 300.11(B), cable shall be installed as specified in ...
NoSparksPlease's user avatar
6 votes

Determining wire gauge based on MCA and max fuse size

Having both a minimum (in your case 29.9A, which effectively means 30A) and a maximum (40A) is quite common. Note however, that if the actual load is 29.9A then it may need a continuous use derate, ...
manassehkatz-Moving 2 Codidact's user avatar
3 votes

How can I transition from 1" EMT to NM cable?

NM routed through a protective metal sleeve (as opposed to a conduit system) doesn’t need to be clamped to the sleeve. You can just put an anti-chafe bushing on the end of the sleeve (so the NM doesn’...
nobody's user avatar
  • 6,640
0 votes

How can I transition from 1" EMT to NM cable?

The obvious answer would be a small box, or a fitting with an access panel that can be used as a box, to contain the splices between the individual wires in conduit and the BNC, with appropriate ...
keshlam's user avatar
  • 28.5k
0 votes

How to move lamp switch from inline to separate wire?

You can do this with a regular extension cord. Plug the extension cord into the wall. Plug the inline switch cord into the extension cord. So long as the extension cord is long enough to allow you ...
mdfst13's user avatar
  • 345
1 vote
Accepted

3 way light switches with gfci

Yes, that will work just fine. You can't put a GFCI in the ceiling. But receptacles in a garage need GFCI protection, so any place before the switch: GFCI/breaker GFCI/deadfront GFCI/receptacle is ...
manassehkatz-Moving 2 Codidact's user avatar
1 vote

How to move lamp switch from inline to separate wire?

Consider the variety of power taps and power strips on the market that include wired or wireless remote control ranging from motion sensors to phone apps to capacitative touch detection. Many of them ...
Robert Chapin's user avatar
6 votes

White wiring for everything?

Sorry, that won't work. There technically isn't "neutral wire". You might be referring to "ground wire". But here's the deal - at least in US/Canada: With individual wires and most ...
manassehkatz-Moving 2 Codidact's user avatar
0 votes

Options for replacing a remote-operated ceiling fan/light?

Rooms without a center ceiling light and associated switch are not required. In many areas that's the default. Some places have a switched outlet instead. But plenty have no switch. Typically much ...
cde's user avatar
  • 633
1 vote

Trouble in rewiring a 4-way after removing transformer that was connected to the middle box

The key step was getting power from box 3 to box 2. I ended up taking power from the other switch in box 3, wiring it as a common wire, and pigtailed it to the common screw on the 3-way switch. Then, ...
Bill Chen's user avatar
1 vote

Where to attach extra wires in pull-cord fixture

The black socket wire and one of the switch wires need to be spliced. It seems the manufacturer was too cheap and lazy to ship this product fully assembled. The remaining switch wire needs to be ...
Robert Chapin's user avatar
0 votes

More 3 way working questions

Figure 1. A 2-way lighting circuit with 3-wire switches. (Image mine.) How it works: With both switches up current will flow through the upper traveller wire. LAMP1 will be powered. With both ...
Transistor's user avatar
  • 1,067
1 vote
Accepted

Options for replacing a remote-operated ceiling fan/light?

The starting point is a requirement that most rooms are required to either have a light on all the time or a switch near the entrance that controls either an overhead light or a receptacle that you ...
manassehkatz-Moving 2 Codidact's user avatar
0 votes

Options for replacing a remote-operated ceiling fan/light?

If you google " remote controls for ceiling lights", you will find a few options. Most have the receiver made small enough to fit into a junction box. None i looked at showed a UL ...
RMDman's user avatar
  • 27k
4 votes
Accepted

Rewire floor lamp: how to replace bulbs (from fluorescent to LED) and remove ballast units?

According to the answer from Ecnerwal, the rewiring should be as follows: The dim switch controls power to the ballasts, so if you power the lamps from the ballast live and neutral connections (two ...
Pontis's user avatar
  • 171
3 votes

Rewire floor lamp: how to replace bulbs (from fluorescent to LED) and remove ballast units?

The dim switch controls power to the ballasts, so if you power the lamps from the ballast live and neutral connections (two per former ballast) as shown by the lamp diagram that should get the result ...
Ecnerwal's user avatar
  • 210k
2 votes

In what situation could a fish tape potentially touch live wires?

Commercial buildings regularly have shared conduits with live circuits. Many old circuits that have yet to be replaced with new cables. A string should always be left behind, but that doesn't always ...
KaiserTom's user avatar
1 vote
Accepted

Tap into existing downstream gfci outlet for new fan in show stall

The basic concept is fine. You should make sure that the exhaust fan/light is rated for a wet location. As far as serial vs. parallel: AC electric connections are technically wired in parallel but ...
manassehkatz-Moving 2 Codidact's user avatar

Top 50 recent answers are included