Questions tagged [electrical]

Distribution and use of electricity throughout the home. Electrical standards vary greatly worldwide, so providing your location in your question or your profile helps 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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1answer
15 views

How do I connect light fixture’s ground to supply wires?

Location: US While not exactly a novice in regards to electrical, I’m a little confused here. Replacing ceiling fan+light combo controlled by two switches with light fixture (removing one switch/...
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3answers
85 views

THHN through EMT - then convert to Romex?

I want to wire outlets and light in my unfinished attic. There is a light switch at the bottom of the stairs, cable (I think THHN?) that runs through EMT through the wall and comes out upstairs and ...
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1answer
48 views

100 A GFCI breaker feeding a sub panel main lug

I have an outdoor sub panel that is a 100 A main lug. It is fed from the main panel by a regular 100A 2 pole breaker. I have several things that will be fed off the sub panel for a swimming pool that ...
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1answer
53 views

Determining Bus-Bar Rating for PV Installation

I already have a primary PV inverter connected up through a 40A breaker. I'm looking to expand by adding a second PV inverter. To comply with the 2014 NEC 705.12(D)(2) rule I need to know the panel ...
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2answers
91 views

Is heat a concern with a microwave mounted over a wall oven?

I have a microwave over the wall oven. Can’t the heat from wall oven affect the microwave oven and how much space from back of microwave to wall is needed for air flow?
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2answers
108 views

Under Cabinet exposed NM/Romex

The original builder (USA, ca. 2006) ran exposed NM/romex between the fixtures. Maybe this is a nebulous question, but is that within code?
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1answer
73 views

How do I add a receptacle outside off the porch light

I put in a gazebo in the back of the house and I want to install a receptacle from the only electrical source which is a porch light. I could just run some wire thru the base of the light and run it ...
6
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2answers
1k views

Which 50 amp breaker do I need for my old Eaton panel?

I have an old Eaton panel in my house with a 200amp supply. I need to install a breaker for a 14-50R receptacle for a car charger. The breakers in the panel look different from anything I see in the ...
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2answers
488 views

Why is neutral wired to ground at this switch?

I was looking to add an outlet near my light switch in the garage. When I opened the box for the switch I noticed that the neutral is wired to the ground. In the picture of the switch, the top wire ...
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3answers
88 views

Converting dryer from 3 to 4 prong cord but it doesn't have a grounding screw / wire

I'm trying to convert a recently purchased dryer from a three prong cord to a four prong cord to match my outlet. However, it doesn't have a green screw for the ground line. Where do I connect the ...
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1answer
69 views

Sockets not working but circuit breaker hadn't tripped

We came back from holiday to find that some of our mains sockets were not working. I checked the circuit breakers but none of them had tripped. Eventually I found out that by turning the switch on the ...
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1answer
67 views

How should I reconnect this switch?

I suppose it's a three-way. The red light it's the only hot wire. It was like that when I came to the house. But the wire on top of the red it's going to other room switch and light. The one next to ...
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2answers
92 views

LED lights with a dim light in open circuit

I was installing new LED lamps on my kitchen, which seemed to be functioning well. After turning off the lights, the newly installed lamps still had a dim light, that kept itself for quite long. I've ...
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6answers
7k views

Difference between blue and grey blue coaxial ports

I have blue coaxial ports in almost every room in my house. What the heck are they for? Are these regular cable jacks? Maybe I am confused since cat5e jacks are also blue colored? To add to the ...
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1answer
54 views

Wiring GFCI/Switch Combo

My current set up is that I have a switch on the kitchen wall with power from the panel at the switch. Then a 12-3 runs to a box under the sink, where there is a half hot for the plugged disposal. ...
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4answers
1k views

Diagnosing instant circuit breaker tripping, with nothing connected

I had a previous question regarding an AC, but now that I have disconnected the AC and the problem remains, I want to diagnose this problem a bit more. First step was seeing if this specific breaker ...
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1answer
339 views

New Construction 400 Amp Service / 200 amp sub panel / future solar

Currently I am looking at a 400 amp Square D combo panel installed outside garage(flush mount) and then 4/0 Al feeder to a 200 amp sub panel on the other side of house (135' length). The combo panel (...
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2answers
70 views

Bathroom light fixture above sink and ceiling fan/light combo wiring issue

Hey so I'm having an issue hooking up a bathroom light fixture above the sink with a bathroom ceiling fan/light combo. 1) for the light fixture above sink: coming out of the wall there appears to be ...
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0answers
24 views

whats voltage drop on 40 yards of ws2815 leds [migrated]

We are working on a project of using ws2815 led strips and our concern is how to handle the voltage drop?
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1answer
37 views

Different light fixture in basement on pull switch

I have more than six light fixtures in the basement each has its own pull switch each fixture is getting it's power from some where from each room upstairs and I like to know how can I add a switch so ...
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6answers
53k views

Using half of a 240v dual-phase circuit as a 120v single-phase circuit (US)

Usually when I see a 240v device, it is wired to its own double-pole circuit breaker, with each pole connected to a different 120v phase (to provide 240v total). If there is a 120v device in the same ...
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0answers
33 views

Fixing previous wiring at switch for recessed lighting

I moved in to this house and the ceiling fan and recessed lighting worked (we did demo in the master and the lights worked). Painters came in right after that and the lights have never worked since. I ...
0
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1answer
27 views

LED security light adding a switch

I have this LED solar security light. Now I want to put this in the back of a shipping container and I want to have a switch all the way in the front of the shipping container. I have no previous ...
6
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2answers
30k views

How do I wire a switch to control a GFCI Receptacle?

I want to switch a GFI outlet. It will be on a single 20 Amp circuit breaker with no other outlets or devices in the circuit or downstream from the outlet. It will be used to switch a dust ...
0
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1answer
59 views

My dryer quit and I am getting a strange power reading at the outlet

I have a 3 prong plug for my dryer. When I take a voltage reading between X and Y I am getting 320VAC. Between X and W or between y and W I am getting 160VAC, and my dryer has quit running. Can you ...
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2answers
61 views

Why is my GFCI recpeptacle slow to trip?

I have a GFCI receptacle that takes 2-5 seconds to trip when testing with a standard 3 prong receptacle tester. The test button on the receptacle trips right away but two of my trustworthy handheld ...
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2answers
144 views

Power Panel Grounding and Neutral Bonding / Dryer hookup in an older home [1975]

In my home I have the old 3 wire Dryer and Range connections. Looking at my CB service panel; my neutrals (white) and my ground wires (bare copper) connect to the same bus bar. Main service panel - ...
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2answers
1k views

How to wire a tandem 120 volt, 2 X 15 amp single pole breaker?

I had a new 100 amp panel installed in my house 10 years ago. There is one plug in the kitchen wired (14/2) to a 120V, tandem 2 x 15 amp breaker (using only one pole). What type of wiring do I use to ...
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1answer
767 views

Lost one phase in main panel

It seems I lost a power from one of phases feeding the panel. The pen tester proofs that. It's interesting if I reset the main switch, the power comes back. If I put any appliance (be it a small light ...
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0answers
58 views

Service Panel and New Underground Conduit

So im remodeling and found out my electrical conduit that carries my lines from the my garage was rotted out. I had exposed electrical wires, still wrapped in sleeves, but exposed buried in the dirt. ...
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0answers
58 views

Service needed to add a tankless water heater

I am currently building a detached 250 sq feet studio in my backyard. The studio will have a tiny bathroom with a tankless water heater, a baseboard heater, and a few lights, a mini split (ac), of ...
0
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2answers
192 views

Circuit Breaker Finder - Finding TWO Breakers for one outlet

I have a 1948 house that has mid-century conduit throughout. All old two-prong outlets in the old house; only the 1980s extension has your typical 14/2-G. Anyway, in the old house (as the title says) ...
2
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3answers
119 views

Turning 100A Main to subpanel of 200A new main

I have a 100A old-style circuit breaker main (~1970, 2 conductor & ground) in the basement. I want to upgrade the circuits in the garage to allow for solar panels and PEV cars, so my thought ...
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2answers
172 views

How can I tell if this appliance, a kiln, is using 208V single phase or three phase?

My kilns have recently stopped firing and it need new elements. I have to buy elements for specific voltage/phase combination. I didn't install the kilns - it was done by my studio mate before they ...
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0answers
24 views

Panasonic fan not working

Panasonic fan works intermittently in conjunction with Lutron timer. It does not stay on or go through the timer sequence.
3
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2answers
118 views

Can a standard NEMA 5-15 outlet be installed in a round ceiling box?

In my garage, I installed a series of 4" round ceiling boxes and put plastic (later ceramic) lamp bases on them for some basic lighting. This is the type of box I'm referring to: Image courteously ...
2
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1answer
39 views

Modify 3-way switch to add circuit

I am a DIYer with electrical wiring experience. I would like to add an existing secondary light to the 3-way circuit. The current box has two switches. The one on the left controls the main light ...
9
votes
1answer
970 views

How to electrically ground a gas furnace connected with an armoured cable

My gas furnace will not turn on. I verified 120V where the armoured cable enters the furance, so I was going to continue testing for voltage before and after the transformer (with the door safety ...
3
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3answers
58k views

Is 40-amp breaker enough for my new range?

My new range says it needs a 40-amp circuit breaker minimum. But it also says maximum draw is 13,200 watts on 120/240, so doesn't that mean a 40-amp breaker would be inadequate? By my math, max ...
5
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5answers
2k views

Repair drywall and protect wires on back of electrical panel

My electrician had to cut drywall on the back side of a wall that has a new electrical panel mounted. The back side is the kitchen (the panel is facing into the living room). The feeder and a bunch of ...
0
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2answers
58 views

Use a 3-gang box for 2 switches and feed to outlet - to have more space to play - ok

I have a box with one switch to a fan, one switch to a light, and one cable (ahead of the switches) to an outlet. In bathroom with GFCI breaker. Is it ok to use a 3 gang box, so I have more room for ...
15
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2answers
2k views

Multiple holes in exterior wall studs for electrical wiring

Our home in Toronto was built in the early 70s with aluminum wiring. Since we are doing a bunch of renovations we took the decision.to replace the existing aluminum wiring with copper wiring. The ...
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3answers
114 views

Possible electrical wiring paths are blocked *everywhere* by glulam posts. What to do?

The extension to our house is built to earthquake standards, so there are 10x10 posts and beams everywhere. We can't find a path to feed the 12AWG to the subpanel. If we go down, we just run into the ...
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3answers
69 views

3-way light switch mysteriously works, then stops working, then starts working again

I have a three-way light switch that is exhibiting really odd behavior. Sometimes it works and sometimes it does not. For example, just now the following happened. Lights are off. I go to switch A ...
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2answers
25 views

2015 Samsung Refrigerator/Freezer keeps tripping circuit

I move my Samsung unit to the garage and plugged it into a receptacle. It has been there for a year with no problem. Two days ago it started tripping the circuit every couple hours. I plugged it into ...
0
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2answers
48 views

One “hot” wire be pigtailed into multiple “hot” wires. How does that affect the electricity going through them?

When wires are pigtailed together like this: ...one of the black wires carries the current "in" to the nut, and the other two wires carry it "out" to the outlet and whatever other devices are down ...
0
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2answers
23 views

Contactor relay connected to circulating pump not working

I have a 120V coil contactor relay connected to a pump. The pump is connected on the control terminals of the relay. I would like to switch another circuit when the pump circuit is turned on, but ...
0
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1answer
67 views

Where should I connect my ceiling fan's blue wire?

I want to install a new fan and light assembly. I removed the old one, which on the wall is a hard wired 2 switch, one for the fan and one for the lights. Coming out of the ceiling is a white, black ...
1
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2answers
58 views

How to calculate wattage used in a solar panel set-up

I want to run an electronic that uses 300 watts @ 5-10 amps via solar panel's on my rv. I've got (2) 6 volt batteries set up in a series so it is 12 volts. Here are the stats for one battery (so I ...
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0answers
49 views

Linear motion to rotary motion, design

How can I convert the linear motion to rotary motion? The linear force is from a solenoid. Below is my design: The axle goes perpendicular to the plane of paper. The axle needs to be rotated by an ...