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0
votes
2answers
58 views

why is a service neutral grounded but not the subpanel-neutral?

I know it's code (refer to NEC 250.24(A)5 and 250.32), but I don't understand why you can't use a bonding jumper to connect the ground bus and neutral bus in the subpanel? I've been told it's because ...
0
votes
4answers
90 views

What is the danger of a bootleg ground on a 110 outlet wired from a 3 wire 240 circuit?

This is not a question about whether it is in code, or safe to wire a 110 outlet with its neutral to the ground of a 240 circuit. I accept that it is unsafe, and it's certainly not up to code, I'm ...
1
vote
1answer
52 views

Removing bulb causes a different fixture to go out

I have ceiling fixtures, let's call them A and B. Normally, both fixtures are always on (lit) -- no switch controls them. When I remove the bulb from A, fixture B goes out. Here's how it looks ...
0
votes
0answers
21 views

Any electrical power turn on while the kwh metre been reading could give you high electric consumption?

Day before Last saturday in the morning, I went to the electric watt metre and i did reading it, but then by tomorrow power supply personel went there and did the actual reading of current while most ...
6
votes
5answers
1k views

Are power outlets in a home out of phase with each other?

I'm working on a science project and there's one aspect of home wiring I need to find out (don't worry, I'm not messing with wiring - this is all on paper). Since 120V outlets in a home can be wired ...
2
votes
1answer
397 views

Live wire running through entire apartment wall?

I'm currently renting an apartment and my spouse and I want to hang a metal fixture above the wall where our bed is (in lieu of a headboard...for now at least). Where I want to hang it is 4 feet above ...
1
vote
1answer
46 views

One half of my mobile home electrical won't work

I was switching out a couple of switches when I bumped two of the wires, they sparked and popped. Now on one whole side of the mobile home the outlets and switches won't work. I checked the breakers ...
3
votes
2answers
69 views

Are barrier terminal blocks or bus bars inside a junction or weather-proof box up to NEC code?

I'm going to be adding some Particle Photon relay control to some receptacles so I can remotely turn on and off appliances and lighting. I'm going to house the Photon board and relay in a ...
0
votes
1answer
32 views

adding electrical GFCI plug

can a GFCI outlet be added to the end of a circuit? if so do you need a 3 core wire? we have tried to install with 2 core wire but it dosent seem to work
0
votes
1answer
38 views

Can I move the main breaker box to inside a small bathroom?

This is very similar to the "electric box over sump" question. I'm finishing the basement, which includes upgrading the breaker box and moving it to a more suiting location. I would really like to ...
2
votes
3answers
226 views

Distributing load in electrical panel

I am in the process of rewiring my house. The house was built in 1950 and even though the service panel was upgraded in the early 70's to a Square D 200 amp service, the system is ungrounded and will ...
0
votes
1answer
88 views

Fuses blow and sparks appear when using my home's wiring circuits

I have recently had issues with different electrical appliances / light bulb / bathroom wiring packing up. If you put 4 bulbs in different areas of the house, you can guarantee that 1 or 2 will blow ...
3
votes
1answer
97 views

Mystery Electrical Voltages in Duplex Junction Box

So I'm finally getting around to installing the ceiling to floor bookcase in my home office. There is a single duplex outlet that I intend to reverse from facing into the office, to facing outwards ...
0
votes
0answers
30 views

Power at breaker box but not in attic?

I have 120V on wire at breaker box. Traced same wire in attic and have no power at junction box. Replaced breaker still no power. What else can it be? Also at another junction box in attic there are ...
3
votes
3answers
117 views

How to run wire through steel garage floor system

We are building a carriage house, with a 4 car garage and a basement underneath. The basement has steel I-beams and the metal b-decking that the garage floor is poured on top of as a ceiling. What ...
0
votes
2answers
97 views

there is only one wire going to a light fixture

I was asked to install two wall sconces. The old ones were removed but there was only one feed wire (hot from the switch). This is an old craftsman house in california,
1
vote
3answers
68 views

How do I choose which breaker breaks first?

Let say I wanted some power out in my shed. I ran just 14 gauge wire thinking I won't blow the 15A breaker with just lights and the occasional smaller power tools. For the most case this is true... ...
1
vote
1answer
25 views

The subpanels ground is not bonded to main panels neutral busbar

The main panel has a neutral and three ungrounded conductors entering it from the utility provider is also has a grounding rod the neutral and three conductors get transmitted from one location to the ...
0
votes
1answer
69 views

Taking a neutral wire from another meter connection?

I live in a two story duplex, yesterday the other unit's electricity went off, the electrician diagnosed that somehow their neutral path is not coming from the pole so he connected the neutral ...
8
votes
3answers
331 views

How should I route my Romex and Network cables and can I safely drill another hole through this joist?

I am trying to run a bunch of network cables from my network switch in the basement into the attic so that I can disperse them throughout the second floor bedrooms. At the same time, I needed to ...
0
votes
1answer
31 views

I have a 50 amp breaker on the wall for my spa, can I come off of it to 30 amp RV service

I have a 50 amp breaker at my Spa, can I run a 10-2 w/g 130 feet to my RV and install a RV box with 30 amp breaker and a 30amp RV plug?
2
votes
2answers
81 views

Can earthing of a building degrade over time

The building is almost 12 years old. We didn't have this problem before. But in this last 2-3 days some residents complained they have experienced shock coming form the pipeline of bathroom even after ...
1
vote
1answer
131 views

Splitting a light circuit into two

I currently have a simple circuit. Three ceiling lights, and one switch. I would like to break it into two lights on that switch and the other light on another switch. Will I have to run all the ...
1
vote
2answers
235 views

Can I merge two ceiling light fixtures into one with two wall switches?

I have two ceiling light fixtures on two separate wall switches that I would like to merge into one light fixture controlled by the two separate wall switches. Do I just make one of the wall ...
2
votes
1answer
107 views

Can I use a switch to toggle the neutral bonding on a generator?

I am in the process of attaching a 2-Pole transfer switch to my breaker panel and powering it by a 7500W generator. The generator is neutral-bonded-to-ground. I understand I have to disconnect this in ...
1
vote
2answers
128 views

Can I add a 30 amp breaker to a sub panel being fed from a 50 amp breaker

I have 100 amp service panel that feeds a sub panel with a 50 amp breaker. In the sub panel, there are currently five 15 amp breakers that feed three rooms worth of lights and two outdoor outlets used ...
1
vote
0answers
76 views

Subpanel - still getting power with breaker disconnected

I'm in the middle of a garage/apt project and ran into an issue yesterday. Here's my layout. I have a 200Amp service meter with two 100 amp breakers just after the meter....one breaker feeding the ...
0
votes
0answers
18 views

Adding Outside lights

I want to use a switched fused socket 5amp that already supplies an outside security light to add 4 new outside lights 60 watt bulbs. The feed come from my heating circuit ,immersion heater a couple ...
0
votes
1answer
159 views

Multiple outputs from a single outlet box

I want to supply power to a walk-in closet that I just framed. Well, I split a large room into two sections (the closet is smaller) and want to use the current circuit to supply outlets on the new ...
0
votes
2answers
2k views

How can I connect a 120V compressor to a 3 phase WYE 208 electrical system?

I have 4 cables from a power supply which are 3 phase WYE 208 volt. so if I measure between neutral and hot I get 120V. The problem is that I need to hook up a compressor for 110V single phase (just ...
0
votes
0answers
45 views

cable requirements for 100 amp sub panel in attached structure

specifics: Main Panel: 200 Amps desired sub panel: 100 Amps applications: running a welder / 220 air compressor / table saw / vacuum / vehicle lift. structure: Large shop - attached. Cable will ...
0
votes
2answers
94 views

Slow electrical circuits

I have a three way light circuit in my hallway that is connected to three ceiling lights. When I switch it on the third light will hesitate before lighting up. Why? Also, I have a different issue with ...
1
vote
2answers
135 views

How do I determine if I have an open neutral?

I live in VA. My bath and bedroom lights were working fine and suddenly it was as though I threw the circuit breaker. Everything on the bedroom/bathroom circuit breaker went dead. I checked the ...
1
vote
0answers
57 views

Is this main box outdated and needs upgrade?

This house is 1970's built (UK) but not sure when the electrical wiring were done. The main box looks like in the attached picture. It seems it has only fuse boxes in it... and does not have any MCB, ...
2
votes
2answers
214 views

How can I power multiple raspberry pi around the house?

I am planning to power multiple Raspberry Pi's around the house. Some will be security cameras, one will be a media player connected to TV and another one will manage home network and maybe a website ...
0
votes
0answers
80 views

How to ground old style Romex (no ground) multi-wire circult

I have a multi-wire that is very old and doesn't have a ground. I'd like to change this to using new Romex so that AFCI breakers will work. My question is this... Can I band the red wire in my ...
10
votes
1answer
2k views

During a lightning storm, what causes the lights to temporary cut off and on?

I know it is pretty common during a lightning storm for lights to temporary cut off and on, but where and how and why is this occurring? Is the transformer temporally shutting off power to prevent ...
0
votes
2answers
204 views

Parents cable box caught fire, hour later half the house is out of power?

So, My dad was working on a leaking sink in a bathroom and my mom yells there is a fire. Their cable box caught fire, they put the fire out without a problem and mom called the cable company. While ...
2
votes
2answers
2k views

Suitability of flexible metallic conduit serving as ground

EDIT: The attached photo is the most easily accessible example of the conduit used in the entire house. This shows the conduit attached to the garbage disposal with the previously mentioned 3/4 set ...
3
votes
1answer
138 views

GFCI Kitchen Circuit(s)

I understand that all wall receptacles (including counters) must be GFCI protected in a kitchen with a combined dining area but how about a separate dining area/room receptacles (separated from ...
3
votes
2answers
212 views

Troubleshooting dropped phase in 240 volt line

A 60 amp breaker in our circuit breaker box serves a sub-panel in our barn. That panel serves 5 120 volt lighting and convenience circuits. The sub-panel has two bus bars, each attached to one phase ...
2
votes
0answers
59 views

Increasing the size of a sub panel

I am considering solar and the easiest place to connect the system for grid-tie is into a subpanel. With the 2013 CEC, this is permitted. However, I have a slight problem. I don't have any free ...
1
vote
3answers
9k views

How many lighting circuits are needed in the LED era…? (US - NEC)

This is in a two story, ~1000square foot per floor building. With the advent of affordable, decent (IMHO) LED fixtures (finally!) the entire lighting load for the structure looks to be 500W - 1000W at ...
0
votes
0answers
42 views

How can I switch an electrical circuit from one dwelling unit to another?

I recently purchased a 2 family home and decided to live in the 2nd floor unit. My new tenants on first floor are concerned because the basement and front entrance electrical are hooked up to the 1st ...
2
votes
1answer
345 views

How many outlets for a small recording studio/media room?

I'm getting ready to close the deal on a house that has a 20' x 20' detached garage that I will be converting into a recording studio/media room. I'm going to be running two main power amplifiers (A ...
1
vote
0answers
48 views

Circuit Location Detection

We recently got a nearly double electrical bill during the previous cycle. I, wrongly, assumed it was just a fluke and my family had left some things on longer than they were supposed to. This ...
0
votes
0answers
56 views

Why is my short circuit miniature circuit breaker not tripping?

I have two three-phase consumer units in a bakery. One is the latest Wylex that's recently been installed. It serves ovens and fridges etc. The other one is an old installation Crabtree with brown ...
3
votes
1answer
43 views

Bank of wall outlets not working

I have a bank of wall outlets that are not working. I have checked the fuses and found all of them check ok at 120 v ac. I then replaced all three outlets with new ones and still have no power. I did ...
1
vote
1answer
1k views

What size breaker and wire do I need to feed a panel for a tankless water heater?

I purchased a electric tankless water heater and I would like to know the following? The unit requires 3 separate 40 amp breakers, one for each line. I have 200 amp service. The subpanel will be ...
1
vote
1answer
220 views

Can I feed a panel 200' away from a double pole 30 ampere breaker using 10 AWG copper conductors?

I need 14 amps at my boat house to run a boat lift on 120v. The boat house is approximately 200' from main panel. I can run conduit and #8 wire and make it work with no problem, but I will need to buy ...