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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Mysterious junction box in bathroom

In my house there is a junction box near the floor in the bathroom. It was presumably installed by or on behalf of a prior owner who did some renovations on the lower floor. Here it is in all its ...
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1 answer
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Old metal ceiling light box, wire clamp question

Do these clamps just tighten against the wire and not use any protection from the hole in the box? I was changing out a light fixture and thought I'd ask, since I was in it. I mean I guess it's been ...
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Older Coleman Electric Furnace Not Used

My wife's family has this older Coleman electric furnace in their mobile home that is not being used, instead they use electric space heaters. We're not sure how long the furnace has been unused or ...
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0 answers
29 views

New gfci outlet keeps tripping

I installed a new gfci outlet outside through my attic to power a roof de-icer cable. I tapped into a dedicated outlet for an air conditioner that runs to the floor below. Additionally in the attic I ...
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2 answers
46 views

Philips Hues and lights

This is going to sound confusing so I apologize. I am very close to hiring an electrician, but I’d love to share here and see if anyone knowsthe heck is going on! I recently bought Philips Hues light ...
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2 votes
2 answers
211 views

Can I use an existing/abandoned "pipe" to run 12/2 & 14/2 to a garage

I am adding a 20a breaker for a new saw in the garage. There is an existing 1" steel pipe through the poured concrete floor of my patio that links the basement and the garage. There is an ...
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2 votes
2 answers
190 views

Stranded vs Solid 10/2

I'm trying to find out if THHN 10/2 (No ground) stranded will be ok in place of 10/2 Solid or just 10 ga. There's none solid 10 ga available in my area. Four 30amp circuits in my panel all run in EMT ...
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0 answers
26 views

GFCI trips on separate circuit when another circuit is on

When both circuits are on the GFCI on circuit 1 trips but the outlets on circuit 2 stay powered. it looks like the blacks are bridged but I’m not sure how to resolve the issue.
0 votes
3 answers
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Adding a outside receptacle to a 30 amp camper line?

I am running a 10 awg wire for a 30 amp camper outlet to a carport. Can I add an outside receptacle to the same line or do I have to run a separate 12/2 cable for the receptacle?
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1 answer
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Are there any side-effects of putting a soft-start on a 2-wire well pump?

The house I moved into has a well. I find that the inrush current to the pump is some 26 Amps (normal running is between 6 and 7 amps). The pump is a 240-volt, 2-wire pump. No start capacitor can be ...
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2 votes
3 answers
282 views

100 amp residential house service panel unbalanced voltage and power drain under load. Causing power outage

About a month ago I had my service interrupted - half the house lost power, one leg of breaker box had no power, then while trying to troubleshoot the issue I lost all power to both legs. Completely ...
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14 votes
4 answers
3k views

Why is my background energy usage higher in the first half of each hour?

I have a smart electricity meter, which reports half-hourly readings to my supplier. I’ve noticed that when I’m not in the property, there seems to be an oscillating pattern to my energy usage: the ...
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2 votes
1 answer
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Service entrance passing through crawlspace

I asked this question elsewhere and have checked the IRC for an answer. The only thing I could find on crawlspaces was E3802.4 I don't want to have a conduit running around the outside corner of the ...
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5 votes
3 answers
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How can I fit a 60A EV circuit breaker in my service panel?

I recently got a Tesla and want to install a wall-mount charger. It needs a 60A double pole circuit breaker for max charge speed so I am wondering what I can do here to free up that space. I have a ...
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1 vote
2 answers
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Why is the interconnect wire with my smoke detector getting DC volts?

My smoke alarms went off yesterday. Verified there was no fire and tried to reset the units with no luck, they would keep alarming. I ended up disconnected them from the hardwire and they would stop ...
1 vote
4 answers
102 views

10/3 uf cable for 30 amp circuit

I have a 10/3 UF cable running to my greenhouse, but I am not sure of the exact distance it runs underground. I want to add an electric heater and would like to use a 30 amp circuit but my only ...
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1 vote
1 answer
174 views

What are these electrical devices in wall junction boxes?

My partner purchased a previously poorly-maintained house built in 1924, and these two single-gang boxes have some mystery contents. What are these two receptacles and can they be repurposed as 120V ...
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1 vote
1 answer
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Outdoor light fixture

I have a an old garage light fixture that has no metal box. The hot/cold wires go directly through the bricks with no ground wire. Can I connect the ground wire to my mounting bracket screw?
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2 answers
48 views

rewiring two lights to one light

I have an outdoor wall sconce with two candle style bulbs and two sets of wires for each candle. I want to replace this fixture with the new one which has only one light bulb. I don't really want to ...
2 votes
4 answers
210 views

How to tell if light switch wires come from main or light - old wires

I have an older house where I want to turn a single pole switch to a 3 way. The problem is that this light is on older wires which I cannot replace at this time. When I open the switch I only see 2 ...
1 vote
2 answers
89 views

Circuit breaker tripping when heat kicks off [closed]

Why is my 70 amp circuit breaker trip periodically when my furnace blower motor kicks off?
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1 vote
5 answers
67 views

Can I replace a fried 60A tankless water heater wired to a double pole 60A breaker on 6AWG with a 40A tankless water heater?

Original tankless is a Eemax 13 Kw 60 A and the replacement is a EcoSmart 8 Kw requiring a 40A DP. Currently in our electrical box is a 60A DP. Do I need to swap this for a 40A DP or will the 60 A DP ...
3 votes
3 answers
235 views

How to wire a second sub-panel from outdoor main disconnect

I need to install a 240v 50amp breaker for an EV charger. There’s no space on my main panel in the basement. I’m hoping to install a new subpanel outside near my main disconnect next to the meter. ...
2 votes
1 answer
112 views

Adding EVSE to 100A service, load calc at 99A

I currently have a 100A main panel and 100A service from the utility for my house. I would like to add an EVSE. I looked at 220.83 (a) and (b) since this is an existing dwelling. It looks like if I'm ...
7 votes
1 answer
670 views

Does a Junction Box in the Attic Need to be Covered

I've recently had a kitchen renovation done - actually swapping the kitchen and dining rooms. The electricians were subs working for the company doing the reno. They ran some new circuits for the ...
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6 votes
2 answers
501 views

Bonding (solid 6ga bare) wire from supplemental grounding electrode to main GEC -- can they not be spliced?

This is just a hypothetical....If you have a 6ga solid copper from the bar in the panel to an outside ground rod, can you or not splice another pc of 6ga solid copper from the current 6ga wire to go ...
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0 votes
1 answer
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What causes sometimes low voltage & sometimes high voltage on different circuits in my house? And I have to run 2 space heaters for either to work [duplicate]

I’ve had issues with flickering lights for a while & over the summer we added a window unit to my sons room & you could barely tell it was running. I used my meter to check several outlets ...
4 votes
2 answers
133 views

Two circuits in same junction box when each circuits originates from two different subpanels

I would like to install two switches in the same gang box, but each switch would be on a separate circuit. The issue I have is that the two circuits originate from separate subpanels. Is this OK to do?...
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1 vote
1 answer
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Clocks Running Fast and lights flickering after new heat pump installed

My old heat pump packed in and a hew one was installed last week. Ever since i’ve noticed the oven clock is running fast, gaining up to an hour a day and lights have a constant flicker. We had moved ...
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-3 votes
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Spreading two wire 240 into a 110 line breaker [closed]

I live on the side of the freeway yes I'm home and I'm trying to hook up to an exit sign there's two wires going into the exit breaker box and they're 240 how do I run off the two and make 110 in ...
0 votes
2 answers
48 views

Two switches in one gangbox have a black wire connecting them together. Why?

I am updating a couple of switches that are in the same gang box. All wires connecting to both of the switches are black. One switch has three back wires going into it and then on shared shorter ...
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4 votes
2 answers
1k views

What to do with extra hot wire found in switch?

I'm replacing a light switch in my house that has some very old wiring. When I removed the old switch I found that there are two hot wires, and one of them was joined with neutral – so on one end of ...
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2 answers
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One of Two New Sconces Not Working

I just replaced two sconces above my stairs. One of the sconces is working, but the other is not. I checked the connections and bulb, but nothing fixed it. So then I tried to reinstall the old fixture ...
2 votes
1 answer
38 views

Weatherproof junction box has two types of holes/ports - what connector is compatible with each?

I've got some weatherproof outdoor junction boxes and am trying to figure out what type of connector is compatible with each hole/port. Below is a photo of a sample weatherproof box with two deep ...
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2 votes
5 answers
67 views

How do I wire a timer for a fan to a GFCI receptacle?

I have a 20A GFCI outlet that I want to wire a timer to that will control a ceiling exhaust fan. However the timer I have requires connection to a 3 wire (B,W,R-G) box, but the GFCI outlet is only ...
0 votes
1 answer
87 views

Mystery box double tapped on dryer circuit

I had a home inspection done and he commented that there was a double tapped circuit on a breaker which is typically a no-no. The extra wires just go to this little box which doesn't seem to have any ...
0 votes
2 answers
67 views

Can I connect the ground to the light fixture

I have an old house and am updating the wiring. The old wiring had hot and neutral only, and some of the hanging lights only have two connections also. However they are hanging from metal chains. Can ...
0 votes
1 answer
56 views

Minimum distance requirement between service drop cables

Is there a minimum distance requirement between service drop cables? I live in orange county california. Thank you
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5 votes
3 answers
1k views

LED lights constantly flicker when heat pump is running

A few months ago we had our gas furnace replaced with an air source heat pump, using our existing ducts in our single level 3 bedroom house. As part of this update our electrical service was upgraded ...
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1 vote
1 answer
43 views

Electric furnace fan won't stop sometimes, however it does turn on okay

I have a York Electric Furnace (10 years old) with a outside heat pump. Something weird happened recently as we started to use the furnace more often as it gets cold now. I usually turn on the heat ...
6 votes
2 answers
2k views

Can I have breaks in electrical conduit?

I am running conduit for thhn wires in the crawl space below the house. I have some 90° bends, and it is tight to fit an elbow, so I just wanted to leave wires exposed for ½ inch or so. No plans to ...
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2 votes
0 answers
38 views

Which Residential Electric Load multiplier is valid for water heaters and EV charging?

I know how to perform a residential load calculation using either: -(a) the Standard Method, which includes a 0.75 multiplier for fixed appliances (so, a 4500W water heater would be treated as adding ...
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1 vote
2 answers
88 views

Can 12/3 be used to supply two 12/2 cables? [duplicate]

I am currently in the middle of finishing a portion of my basement to become an office. I am in NY State in the US. I plan to have two groups of lights, each controlled by its own switch - two light ...
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-3 votes
0 answers
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What are common residential uses for all the different breakers? [closed]

There are an array of breakers available for most electrical panels (120v 15amp-50amp, 240v 15amp-125amp or more) and I'm wondering what some common uses are for each of them. I tried to search around ...
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1 vote
1 answer
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How to deploy a handhole box out of doors

I have conduit surfacing in an outdoor location that is not ideal; I wish it were a foot to the left. In general, I understand that I could put in a handhole box for this purpose. These boxes are not ...
3 votes
1 answer
78 views

Testing outlet for grounding caused breaker to trip

I searched the forum and could not find something similar. Apologies if this has already been asked. I was watching YouTube videos explaining how to test outlets and in the videos testing Hot to ...
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3 votes
4 answers
790 views

How to control multiple independent circuits from one switch?

If I have several separate circuits in my house, each with their own circuit breaker, how can I turn all of them on or off with only one switch? The circuits could be all of one voltage and amperage, ...
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2 votes
1 answer
68 views

Rewiring fluorescent fixture for LED bulbs, safest way to arrange the wires?

I have two twin-bulb fluorescent fixtures with dead ballasts and I decided to rewire them for LEDs. I've seen multiple ways to do it, and I don't know what's best. Here's what I currently have: I've ...
0 votes
0 answers
35 views

How do I run wire for LED panels with a 0v-10v dimmer?

I have two LED ceiling lights with 0-10V dimming and want to wire them to two individual dimmer switches (I want to be able to dim them independently of each other). I'm trying to figure out how to ...
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2 votes
3 answers
342 views

Multiple switched circuits [closed]

I have a client that just had 10 electrical outlets installed in the floor of his salon. Each outlet is on its own 20 A circuit. He wants to turn on and off these circuits with just one or two ...
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