Questions tagged [electrical]

Distribution and use of electricity throughout the home. Electrical standards vary greatly worldwide, so you need to provide your location in your question or profile to ensure you get answers that are relevant to you. Posting photographs of wiring junctions or drawing a wiring diagram and posting it is also highly recommended.

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Is there a maximum length for L14-30 generator cables?

My home has an L14-30 type generator hookup that is located in an attached garage. About 50 feet away I have a barn with an LPG quick connect. In the event of a power outage my plan is to hook up a ...
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Wiring (neutral bonded to ground?) for a TF151 furnace transfer switch

I recently had a new furnace installed, and had the electrician add a Reliance TF151 transfer switch so I can power the furnace from an portable generator during a power outage (yes, inverter ...
4 votes
2 answers
645 views

Replacing a standard 120v outlet with new outlet with USB charging

I want to replace a standard 120v outlet. It has a copper ground, and on the left side a white wire to the top silver screw, and on the right side 2 black wires (one to each brass screw). My new ...
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1 vote
2 answers
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Fan timer switch only works when adjacent light switch is off

I have a bathroom ceiling fan with a light. The fan is controlled by a mechanical dial timer switch and the light is controlled by an on-off switch in the same wall box. The mechanical dial has been ...
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0 answers
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All the ceiling light stopped working apart from 1

All of my lights in the ceiling have stopped working apart from 1, they are all on the same circuit breaker and thus has not tripped. When I check the wires there seems to be electricity everywhere. ...
4 votes
5 answers
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Is light flickering only on camera is bad?

I have installed lights in my house. The lights don't seem to flicker in eyesight. However, when I look at the camera feed on my iPhone, the light is flickering at a very high speed. Is this bad for ...
2 votes
3 answers
516 views

Can anyone identify this screw from a Dell computer? [closed]

It's from a Dell computer so not exactly home improvement but hopefully not too far off topic. I would guess it's metric, being tech, so I assumed it was an M1.4 given the shaft is about 1.4mm across. ...
1 vote
1 answer
41 views

Changed vanity light to a switch light but only works with ceiling light on

In my bathroom there was originally a ceiling light on a switch & a vanity light with a pull chain. I bought a vanity light to wire onto a switch & tried to wire it to work independently of ...
0 votes
2 answers
64 views

Can I plug dust collector into NEMA 6-50?

I've searched what feels like the whole internet for an answer to this seeming easy question, but cannot find a definitive answer: I'm looking to purchase a 220v dust collector (Shop Fox W1666) to run ...
1 vote
1 answer
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wiring diagram for double gang box bathroom

enter image description hereI have an existing double gang box in my bathroom that contains a gfci/switch combo and a single pole switch. The switch on the gfci controls the exhaust fan and the ...
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Temperature hot receptacle

I noticed the area around our floor outlet was warm, so I further inspected the outlet and receptacle. The circular brass faceplate was quite warm. I unplugged our power strip and lamps, and waited 24 ...
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LED flickers when put into my outside fixtures but incandescent bulb have no problem

When I install LED bulbs into my outside fixtures they flicker but when I install incandescent bulbs there is no problems with the light. No flickering at all. Edit: There's no dimmer, but it has a ...
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Convert 120v to 240v and run inverter/charger?

Currently I have a generator that outputs 240v/30A via a L14-30R generator transfer cable. I hook this to my inverter/charger to charge the batteries in my off-grid cabin. The Inverter/Charger ...
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2 votes
1 answer
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Wilo Star S 21 FX pump for outside wood burner using only a 2 wire power supply (hot and neutral)

I have a Wilo Star S 21 FX pump (water circulation) on an outside wood burner that needs to be installed. The wire that fed the original pump (an off brand) has a black and a white wire. The 2 wire ...
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1 answer
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Power switch has changed directions for power

Hall bathroom wall Light switch has changed directions all of the sudden with no one doing anything to it to turn on the light, instead of flipping up the switch as usually now you have to flip it ...
8 votes
3 answers
1k views

How can I measure the actual amperage rating of my circuits so I can match it with correct fuses/breakers?

My house has a fuse panel instead of a circuit breaker panel, and as such it's way easier for the wrong ones to be installed. I don't trust that the previous tenant had the right ones in the right ...
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8 votes
3 answers
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Living room breaker will not turn on after pressure wash

Front of the house pressure washed. Water got in the 2 outlets outside that caused the living room breaker to trip. We waited 24hrs for it to dry out. Nothing. Replaced with a new breaker and still no ...
1 vote
1 answer
107 views

How to wire this 220 wire

Bought this induction coocktop that says "220" but the wire is this one My question is How can I connect this if it does not have a second wire for the 220? Live in Mexico, we use 4 wire, ...
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3 votes
1 answer
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add neutral wire to existing "bundle" for smart switch - need help understanding box

Attached is a markup picture to help identify wiring. This is in the USA. There are wires that come in from the bottom left of the box and from the top right of the box. I'm just a DIYer, and I'm ...
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0 answers
36 views

Breaker panel questions with dryers involved

There are two different breaker panels where I live and in my apartment hallway my one light switch controls my washer and dryer and also the switch in my control panel, however, my neighbor's ...
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2 votes
1 answer
118 views

Where is the neutral hooked up to this old fuse box?

I am wondering how the neutral is being fed back to the source? In new breaker box they usually have a neutral/ground bus. This does not
2 votes
3 answers
529 views

Installing outlet in electrical box with two sets of wires?

(apologies for possibly very newbie question) I found this setup in an electrical box in my downstairs closet underneath my stairs. It has two sets of wires that seems to be connected serially. My ...
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2 answers
71 views

Faulty Electrical

So I have some outlets and switches that aren't working. Periodically they will start working again out of the blue. Power company has been out abd che jes their side of things. Both legs are working. ...
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NO POWER after shorting (2) hots of a multi-wire circuit in 3-switch indoor jbox

the goal was to swap smart switch for exterior lites with standard switch and dusk-to-dawn lite bulbs. I turned on entry light to identify when I had correct breaker turned off. While working in the ...
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1 vote
1 answer
27 views

Diagnosing lamp electrical issues: 3-socket floor lamp has resistance for each socket, but no power

I am trying to fix this floor lamp It is a standing floor lamp with 3 bulbs and a rotating switch that has 3 positions: 1 bulb on, 2 bulbs on, 3 bulbs on, or off A couple of weeks ago I saw a spark ...
0 votes
0 answers
31 views

Can't read any electricity on recessed light

I just removed two lights and when I switch them on, I can't read any volts DC or AC. The wires have a cloth sheathe. I tested with both a contact sensor and with a multimeter. I thought they may be ...
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1 answer
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Why does one LED light turn off/flicker when adjacent dimmer switch is at 100%

We have an LED light fixture over our kitchen island. After about 2 years of use, it just stopped working (when you turn the fixture on via dimmer switch you can hear a humming coming from the fixture,...
2 votes
2 answers
62 views

1" to 3/4" EMT bushing or adapter?

What's the proper bushing or coupling for stepping 1" EMT down to 3/4"? Does such a fitting (bushing?) even exist? My searches for a 1" to 3/4" EMT adapter pretty much come up ...
1 vote
1 answer
30 views

Dimming 2 recessed light strings with 1 light in common

I'd like to implement something like this : I.e. Having 2 groups of lights with one light able to be controlled from both dimmers (1 & 2 on the picture). Is it possible? I'm not sure, from what I'...
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4 votes
3 answers
849 views

Main water supply's grounding wires

I am confused about the house's main water supply grounding wires and the purpose. From here I read the following: A jumper ground wire at the water meter is am important safety device that should ...
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4 votes
4 answers
233 views

When did Handle Ties become mandatory for MWBC?

I was extending a circuit in my kitchen last week as part of a remodel and discovered something that had been under my nose the whole time I've lived here but I just paid enough attention to notice. ...
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2 votes
3 answers
616 views

I installed some wire nuts, but they push back on the cover when closed

I had to replace a sink disposal recently. The disposal came with a plug which my setup doesn't have, and I removed it and attached the wires coming from the wall directly to the inside of the ...
0 votes
1 answer
47 views

How to wire a NEMA 6-50 receptacle to a 240V GFCI breaker?

When wiring a 240V GFCI breaker to an NEMA 6-50 receptacle, does one leave the neutral terminal on the breaker open and run the ground wire from the receptacle to the panel ground bus-bar? Does the ...
0 votes
1 answer
52 views

Electricity goes out during day and half of what was out comes back on during the night

i have no idea what is going on. i live in a tri level home. i have a basement, a main level and an upstairs. some time during the day while everyone is at work/school the power in the basement guest ...
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2 votes
2 answers
438 views

Main panel grounding modification (two grounds in box to single ground wire)

My old house’s main panel has two ground wires, one leading to pipes, another to a grounding rod. Because the bottom is the only easily-accessible side for new circuits, and because most of the ...
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1 vote
1 answer
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Improving Well Pump Wiring for Portable Generator Use

This is how the 240v well pump at my house is wired. In my part-time DIYer experience, this doesn't seem up to code. This is in a shed about 80 feet from the main panel. The grey wire is 10/2 UF ...
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2 answers
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How many #12 wires are needed for 240V and 120V circuits in a shed in metal conduit?

I need to run a 50A 240V and 12A 120V circuit from a panel in a shed to a metal box (outside rated) in the same shed. I know I don't need a ground wire because the conduit can serve as the ground. ...
5 votes
3 answers
1k views

Why might Siemens imply GFCI breaker will reduce protection on 3-wire dryer circuit?

I found this warning in the instructions for a Siemens 2-pole 30 amp GFCI breaker which will be installed for a dryer circuit: To obtain maximum protection against electric shock, electric ranges and ...
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0 answers
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Is a service conductor not part of the service?

In Article 100, titled Definitions, of the 2020 Edition of the National Electric Code, the definition of premises wiring includes "wiring from the service point" to the outlets. The other ...
-1 votes
0 answers
24 views

Questions about Numbers in NEC [closed]

In the 2020 Edition of the National Electric Code, 110.26(3) says that the clear height of the working space shall be at least "2.0 m (6 1/2 ft) or the height of the equipment, whichever is ...
-1 votes
0 answers
29 views

NEC 83% Rule Liability [closed]

The National Electric Code allows a service conductor and feeder conductor to be rated at only 83% of the service rating and feeder rating, respectively, as shown in Section 310.15(B)(7) in the 2017 ...
1 vote
0 answers
40 views

110.26(E) Dedicated Equipment Space [closed]

In the 2020 Edition of the National Electric Code, in 110.26(E)(1), titled Dedicated Equipment Space, in subsection (a), titled Dedicated Electrical Space, says, ... extending from the floor to a ...
2 votes
0 answers
42 views

Temporarily daisy chaining meter pans

I'm currently getting my electrical service upgraded from 200A to 320 (400A) service. I'm doing preparation work for it -- I mounted the new meter pan along with two 200A panels. I'd like to pre-...
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2 answers
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Making room for wire nuts for a fixture screwed onto a conduit

I am replacing a line-voltage outdoor lamp. The old lamp was screwed directly onto a length of 1/2" metal conduit coming up from the ground. Whoever put this together originally just twisted the ...
2 votes
2 answers
2k views

What remedy for electrician's large holes in studs?

I'm located in Chicago and live in a one story home (no upstairs just basement) and just had an electrician come to add an outlet for a dishwasher and put the refrigerator on its own circuit. They ...
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0 votes
0 answers
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LED dimmer inconsistency after 9 months

I had a 3 new ceiling fan and LED light dimmer installed last year. The dimmer worked great for 9+ months. Recently the light, in all 3 locations, started having problems. At first the lights wouldn't ...
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0 votes
3 answers
134 views

Can I have 2 boatlift motors (rated for a total of 22 Amps), on a old 20 amp circuit if I replace the circuit breaker with a 30amp breaker? [duplicate]

I replaced my 2 boatlift motors with new ones that are each rated for 15amp starting & 11amp continuos,, this takes a total of 30amp starting & 22amp continuos & after a few seconds they ...
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3 votes
4 answers
1k views

Does NEC require junction boxes to be accessible without tools?

I’ve seen a few posts here – including one on a question I asked yesterday – that say junction boxes and the like need to be accessible without tools. The “without tools” requirement is clear in the ...
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5 votes
2 answers
519 views

110.15 High-Leg Marking

In the 2020 Edition of the National Electric Code, in Section 110.15, titled High-Leg Marking, it states, ...only the conductor or busbar having the higher phase voltage to ground shall be durably ...
1 vote
0 answers
40 views

Definition of Service and Premises Wiring [closed]

In Article 100, titled Definitions, of the 2020 Edition of the National Electric Code, the definition of premises wiring includes "wiring from the service point" to the outlets. The other ...

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