Questions tagged [wiring]

The installation of wire and/or electrical devices, to allow the transmission of electricity from one point to another.

23
votes
4answers
139k views

How do I properly feed coax through an outside wall?

I would like to add a new cable outlet to an outside wall and wanted to find out what kind of drill bit is needed to drill through and feed the coax cable as well as anything else to be mindful of. ...
37
votes
11answers
29k views

Why don't you connect unused hot and neutral wires to “complete the circuit”?

I'm new to home wiring and had a question I'd like explained to me. I removed a vent hood over my oven and I thought I had to complete the circuit so I tied the hot and neutral wires that were ...
10
votes
5answers
19k views

What type of ethernet cable do I need for outdoor use?

I want to run about 100 meters of Ethernet cable out my attic and down a drainpipe. The cable will be exposed to the elements, and attached to a gigabit switch (indoors) at both ends. What kind of ...
7
votes
5answers
58k views

Can I tap into an exterior light in order to power a security camera?

I have an exterior light (shown below) that I was wondering if I could tap into, in order to power an outdoor IP cam. I understand I would have to pull appart some cables and potentially purchase ...
2
votes
3answers
19k views

Controlling 110v swamp cooler using Nest thermostat

I currently have an HVAC system that is connected to a Nest thermostat (2nd generation) and I'm planning to use the same Nest thermostat to control a 110 swamp cooler that is currently not connected. ...
9
votes
2answers
50k views

How to determine the correct capacity for a sub-panel for a shop?

I plan to install a sub-panel for my woodworking shop, and would like to determine the total capacity that should supply that sub-panel. These are the main items that will likely be running in the ...
4
votes
3answers
28k views

How to use network patch panel in new house

I just moved in to a townhouse built in 2007 with a seemingly nice CAT5 and coaxial cabling. In fact, I found a patch panel in the closet! I opened it and found this: I also noticed some of the ...
12
votes
7answers
65k views

Is there an NEC-compliant method of repairing minor damage to electrical wire insulation without a junction box?

While trying to pry loose a stubborn cable staple that fastens a 14-gauge electrical cable to a stud, I accidentally tore a very small hole through both the outer jacket and the insulation around the ...
10
votes
5answers
34k views

Can different gauges of wire be used on the same circuit?

My father-in-law is a builder. He has put in 20 amp and 15 amp breakers, and ran 12-2 as the home runs to the switch's and the first plug to make them hot. He then ran 14-2 to feed the rest of the ...
9
votes
3answers
425 views

How to read the numbers on electrical wiring to run within walls

I am wondering how to read the numbers on electrical wiring separated by slashes such as 12/2. What do the numbers refer to? What other numbers should I watch out for when purchasing wires to be run ...
7
votes
5answers
13k views

Is it possible to convert a switched light into an unswitched outlet?

I am installing an overhead automatic garage door opener. My only power source close to where I will be hanging the motor is an overhead light socket that is operated by a switch on the wall next to ...
5
votes
3answers
13k views

How can I convert Cat5e wired sockets to Ethernet?

I recently moved to a new home and I noticed that the phone jacks (RJ-11) were connected using Cat5e cable. I'm thinking I can replace the RJ-11 plugs with RJ-45 and use Ethernet over the existing ...
4
votes
5answers
43k views

Adding a C wire to a new Honeywell WIfi Thermostat

I am trying to install a new Honeywell touchscreen WIFI thermostat and need to add a C wire to my terminal inside the furnace (using the help found at How can I add a "C" wire to my ...
3
votes
8answers
56k views

How can I use a separate transformer to provide a C wire to my thermostat?

Update 02/02/2019 I appreciate all the responses and help but unfortunately i must have not seen the emails stating there were responses! I am now looking into a NEST thermostat and was curious if ...
1
vote
4answers
17k views

How do I wire a GFCI combination light switch when power enters at the light?

I have a Leviton 7299-NW GFCI/switch combo The diagrams in a response to the question "How do I wire a GFCI/switch combo?" is helpful. But I want to see a diagram for a situation where the power ...
8
votes
4answers
610 views

How should ground wires be handled when updating switch loops in an older home?

I have a house built in the 1950’s with fabric covered NMC wiring still present in most circuits. Those original wires are all 12/2 with no ground. I am currently in the process of replacing some of ...
7
votes
6answers
87k views

Can a 20 amp circuit have a 14 gauge pigtail directly to one receptacle?

I'm rewiring a a small part of a wall and I'm confused about a combination of the NEC and the products that I'm able to find. I'm working on a 20 amp circuit (with 12g wire of course). I'm ...
6
votes
2answers
12k views

Is a splice permitted in a PVC conduit body?

I'm talking about something like this Type LB Conduit Body
5
votes
7answers
46k views

How should I wire for a security system during construction?

I would like to run wires in anticipation of a future hard-wired security system. However, I have yet to find any information that pulls everything together regarding what is required. From what I ...
5
votes
3answers
50k views

How can I rewire my bathroom fan, light, and receptacle?

My bathroom has one switch that powers the fan and light. In that electrical box, there is also a hard wired electrical outlet that sits in the bathroom. Since I don't have room for a 2 gang box in ...
4
votes
2answers
4k views

Is it possible (and safe) to adapt a 4-prong dryer outlet to a NEMA 6-20?

I'm considering an appliance that is 240V 16A 3500 Watt with a NEMA 6-20P plug. Is it possible and safe to create an adapter for this so that it can be plugged into a standard 4-prong 14-30R dryer ...
3
votes
3answers
1k views

Is a multi-wire branch circuit with shared neutral acceptable?

I have been checking my house circuits and came across a run that is made up of 14/3 on 2 separate fuses, which branch off in the attic to two runs through the house. I don't like the idea of the ...
2
votes
2answers
27k views

What size breaker and wire do I need to run 2 GFCI receptacles and a flood light on exterior of my house?

Is it OK to use a 15amp breaker and a 14ga wire (14/2 copper) to run 2 GFCI receptacles and a flood light on the exterior of my home? The voltage is 120. The 2 receptacles are rated at 15amps and won'...
1
vote
1answer
232 views

Adding C wire to WiFi thermostat

I’m trying to add c wire to furnace to run a WiFi thermostat but don’t know where to hook up c wire to get power to turn on thermostat i have 2 extra wires just don’t know where to put one them to get ...
1
vote
2answers
552 views

Installing grounded light fixture on box with no ground conductor

I'm installing a brand new motion activated security light to an existing box on my garage. After removing the old light, I notice it only has white/black wiring while the new light fixture has of ...
7
votes
3answers
4k views

Is it okay to run a switched and unswitched hot on the same neutral?

I have a room where I need to toggle the lights by a switch and the outlets in the room to not be affected by the switch. As they are on the same circuit, am I able to run a 3 wire cable from the ...
7
votes
4answers
5k views

Why are light fixture wires allowed to be lighter gauge than house wiring on the same circuit?

why do cables joining the wall sockets in a house need to be thicker than the cables joining the light fittings? I don't understand and I need to know before I buy it.
7
votes
2answers
2k views

How do I terminate coaxial cable in a crimp on F type connector?

I've got some coaxial cable, and I'd like to put F type connectors on the end so I can use the cable to connect my TV to the Cable box. How do I put ends on the cable?
7
votes
2answers
2k views

Is a negative reading from a non-contact voltage detector sufficient?

I'm a beginner at doing electrical work, and I want to make sure I'm not taking unnecessary risks. Let's say that I'm preparing to work on some wiring. I have a non-contact voltage detector that ...
6
votes
4answers
49k views

I'm replacing my outlets and I have too many hot/neutral wires, what do I do?

I'm going through my new home and replacing my outlets. This was mostly fine, as the first outlet was very easy to replace. But, I ran into outlets that have multiple hot/neutral wires. For the most ...
6
votes
2answers
7k views

How does a three-way light switch work?

A three-way light switch allows the light to be controlled from two locations. How does this work?
5
votes
1answer
445 views

Would this be the correct way to add a timer switch to an existing fan with thermostat?

We have an existing 120V AC exhaust fan wired to simple inline attic fan style thermostat. We would like to add a timer switch so the fan could be manually turned on as needed. Would this be the ...
5
votes
2answers
14k views

Do open-back low voltage boxes have advantages over standard outlet boxes?

I will be running LV wiring in new construction. I've seen the open backed Carlon boxes, but have read that they are difficult to insulate, and therefore should not be used on exterior walls. I ...
4
votes
2answers
5k views

Cable securing/support, conduit, etc when exiting main service panel: questions

I'm totally confused by this. Looking for any help that anyone can provide. I've attached a photo of the top of my recently-installed (inspection passed) service panel. The top of the panel sits ...
4
votes
4answers
5k views

How can I wire this three-way circuit between two buildings with only 3 conductors?

I am rewiring my entire house after a major malfunction of two antique knob and tube circuits. I'm up against a challenge with some outdoor lights. Here's the situation: I have a detached garage. It ...
4
votes
1answer
12k views

Can Romex (NM-B) be run in conduit for more than 10 ft when starting from the breaker panel?

The answers to this question indicate that NM can be run in conduit: Can Romex (NM-B) be run through conduit? I was hoping to enclose 12-2 NM-B in EMT for about 20 feet from the breaker box up my ...
4
votes
4answers
11k views

How can I verify that the protective earth/ground is separate from the neutral wire in an electrical AC installation?

It's easy to verify which wire is the phase without relying on wire colors. But I'm not sure if I'm able to determine which wire is the ground and which is the neutral. I have heard that using a ...
4
votes
1answer
15k views

How should I wire this White-Rodgers fan and limit control? What about the thermostat?

I have a wood-burning stove, that is used as an auxiliary heat source in the house. There's a regular electric furnace, and adjacent to it is the stove. The warm air duct (out) from the stove ...
3
votes
4answers
4k views

Looking for or adding a ground to an existing NEMA 10-30 socket

I have an unused older 3-wire dryer socket (NEMA 10-30R) in my garage, I would like to upgrade this to a NEMA 14-30 socket with an separate ground. I'll be using this for an EVSE unit for electrical ...
3
votes
1answer
11k views

What are the codes for electrical wiring in attics?

What is the typical code for wiring in attics? I understand these vary but what's best practice? Can you just have electrical wires exposed with all the junctions, in junction boxes, provided all the ...
3
votes
1answer
146 views

Is this the legal and best way to add power for bathroom fans?

Summary: I would like to add bathroom fans in bathrooms #1 and #2 (see drawings). There are currently no fans. I believe the existing bathroom circuit layout is not up to code so I am looking for the ...
3
votes
2answers
238 views

Can I run NM wire through this type of flex legally

This flex is sold along other types of NM wire molding, but I can't find anywhere where this product explicitly allows NM or not.
3
votes
3answers
6k views

Can I run two cables through the same conduit?

I want to install electrical outlets in my unfinished basement that has block walls. It is my understanding you can't have cable on the walls--that whatever cable used must be protected by conduit. ...
3
votes
1answer
2k views

Should I use 10/2 wire for a lengthy 20A circuit?

I'd like to get some expert/nec compliant advice on my wiring layout. This week I'll be wiring the foyer, porch, living room, patio, kitchen, dining, gallery and hallway to master bedroom. I was ...
3
votes
2answers
2k views

Term to describe two circuits run through one /3 cable

For example, I have a 12/3 cable in which the red and black wires are controlled via separate breakers. The 12/3 drops into a single-gang outlet, out of which runs a 12/2 to another room. Is there a ...
3
votes
1answer
224 views

Can I do a 125A subpanel feeder with slightly-larger-than-#3 wire?

How they are all connected: With all the details and data given below. So Can I do a 125A subpanel feeder with slightly-larger-than-#3 wire? This is detail directly related to the post. Question. ...
3
votes
1answer
3k views

Where in the span of a floor joist can I drill holes to run wiring?

How far from the end of a 2x12 or 2x10 floor joist can I drill a hole? NEC 502.8 does not give this answer, only that you have to be 2" above or below the edges, not in what part of the span it has ...
2
votes
2answers
2k views

Why are most of my cable/coax wires disconnected?

I'm researching an ethernet-over-coax solution for my home. In my closet where all the cabling meet, all but two coax cables are disconnected. There are 14 cables altogether, with 12 cables entirely ...
2
votes
3answers
15k views

How can I replace a 4-way mechanical switch with occupancy sensor(s)?

There is a stairwell in our house, which is currently lit by a fixture controlled by three switches: a 4-way and two 3-ways. The wiring was done very recently and, I'm certain, in accordance to modern ...
2
votes
2answers
787 views

Is my plan for wiring ethernet reasonable?

I would first of all like to start off by saying that I am a software developer by profession, so my networking knowledge is relatively basic. My question is therefore aimed at figuring out if I am ...