Questions tagged [conduit]

Electrical conduit is used to protect electrical wires, when a simple jacket alone is not enough. Conduit may be metal or plastic (PVC). Use with the [electrical] tag.

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7answers
221k views

Can Romex (NM-B) be run through conduit?

A few days ago I asked an electrician if I could run Romex through conduit - he gave me a funny look and said "No, Romex is not allowed in conduit." When I searched online, there seems to be a wide ...
4
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4answers
8k views

Running NM-B in PVC SCH 40 Conduit from Outdoor Breaker Panel

For space-saving reasons, I have outdoor breaker panels, and most of my branch circuits are wired through the attic down to individual outlets. Currently, the wires run through the wall from the ...
30
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4answers
5k views

How to future-proof a long cable run

I'm starting on a project that will involve digging a long (roughly 150-200 meter) trench from my house down to the road. The trench itself will be a considerable expense and so while the ground is ...
6
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2answers
12k views

Is a splice permitted in a PVC conduit body?

I'm talking about something like this Type LB Conduit Body
4
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2answers
6k 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 ...
1
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1answer
397 views

Is it okay to use an LFNC whip to connect air conditioner where subject to physical damage?

I have seen many air conditioners at ground-level in multiple cities near me that are connected using liquid-tight non-flexible conduit (LFNC) whips. Example: http://www.southwire.com/products/whip-...
6
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4answers
54k views

How many CAT6 cables can fit in 3/4 conduit?

I was planning to get 3/4" conduit (Carlon ENT/Smurftube) to run network cables through the house. Just how many CAT6 cables can safely fit into 3/4" conduit?
5
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4answers
809 views

How one is supposed to “plug” a conduit running from basement to attic?

I'm going to install a 2" conduit from my unfinished basement into the attic, through the first and second floor. It will be used primarily for getting Cat6 cables into upstairs bedrooms. 2" diameter ...
7
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1answer
5k views

How can I adapt a wall outlet to suface mount conduit?

I have a single gang in wall outlet in my basement. I would like to adapt it into surface mount EMT conduit to get an outlet at a different location. Ideally I would be able to keep a plug at the ...
8
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5answers
46k views

Why is it good practice to remove sheathing from NM wire when going through conduit?

I've been discussing specifics of an electrical job with a licensed electrician and he mentioned that in my area, it's acceptable/recommended to feed 12 gauge NM wire through an outdoor conduit but ...
8
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1answer
761 views

How should I install a signal cable duct from new home office to a wiring closet?

I'm constructing a new home office and rather than having fixed cables from the (existing) wiring closet, I want to have the flexibility to add/remove/change cables in future, so I've been looking at ...
5
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4answers
86k views

Can I use indoor Romex in buried outdoor conduit?

Or should I use outdoor Romex? I heard that outdoor Romex doesn't need conduit as you are just supposed to bury it. Edit: Ack, I should have mentioned I have existing conduit that I want to pull the ...
4
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2answers
2k views

Is Schedule 80 PVC Conduit Suitable for Short Directional Boring?

I'm running some electrical wire around where I'm building my house. There are two places that I'd rather not dig through: A driveway and a creek. The creek is the most important, because the state ...
4
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4answers
8k views

What's the correct way to pass wire to exterior electrical box?

I'm doing some remodeling in our basement, and came across the following (see pictures). It looks like the contractor simply wrapped tape around the conduit to secure the box to the wall. How are ...
3
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2answers
133 views

Adding wires to EMT conduit to add circuits

unfortunately, the kitchen wiring in our new condo is severely outdated. Just two circuits; one 15amp for lights and one 20amp for fridge, microwave, gas stove and oven, garbage disposal, dishwasher ...
3
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3answers
12k views

Cat 5/6 in same conduit as power: is NM-B required, or is THHN acceptable?

Preface: I'd like to avoid the question of whether one should run data and power together; my question is focused on Code compliance. I'm trying to ensure I interpret Code correctly when running Cat ...
3
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2answers
3k views

Should I be able to run some 1.5" PVC chase conduits from attic to basement next to a cold air return?

I have a new home I just moved in to and rather than having them put this stuff in ahead of time (silly me) I'm now trying to do it now. Here is my situation... I live in a 2 story home with a ...
2
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1answer
2k views

Sizing grounding conductor for multiple circuits in conduit

If I have two sets of conductors (two unbalanced 120V circuits) in a conduit, can they share a ground wire and if so, is the ground wire sized by the minimum ground wire sizes for the sum of the ...
1
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1answer
110 views

Adapting an outside wall outlet to suface mount conduit?

This was a previous question with some great answers. How can I adapt a wall outlet to suface mount conduit? One answer was: "There are collar boxes available that have conduit KO's (knockouts). Just ...
1
vote
2answers
384 views

How to seal hole from bundle of ethernet cables running through wall/floor?

I'm setting up a home ethernet network in a spare bedroom. I envision running up to two dozen ethernet cables out of a patch panel in this room to the rest of the house. I'll likely bundle these ...
1
vote
1answer
51 views

When derating for wires in conduit, do you round up or down?

Someone else is wiring up an on-demand heater. They need three 50A breakered circuits and they want to run the kaboodle in one conduit. They want to use #8 THHN wire because it's allowed to 50A @ ...
0
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1answer
67 views

Branching off multiple horizontal pipe/conduit runs?

I have to run electrical (EMT), network (schedule 40), and compressed air (Rapidair) lines along the walls of my shop. I'm doing this by putting up vertical sections of Unistrut, and attaching the the ...
0
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4answers
1k views

Using PEX as wire conduit

I have some 1/2" PEX-AL-PEX left over and thinking about using it as conduit for ~20' ethernet or phone cable. Pipe is appropriately orange. Will the aluminium layer provide RF shielding? (assuming I ...