Search: Posts Made By: Luke M
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12-01-20, 10:55 AM
Replies: 14
Views: 376
Posted By Luke M

"Does this mean 14 AWG solid wire used in house...

"Does this mean 14 AWG solid wire used in house wiring would need to have 166A of current, for a determined period of time, before they would melt? At what point, would there be a chance of fire,...
12-01-20, 10:48 AM
Replies: 7
Views: 261
Posted By Luke M

UL approved self contained devices exist, I think...

UL approved self contained devices exist, I think they are used mainly in mobile homes, not sure.
11-27-20, 03:32 PM
Replies: 14
Views: 376
Posted By Luke M

"So, this tells me: 14AWG copper conductor, at 30...

"So, this tells me: 14AWG copper conductor, at 30 C or 86 F, in free air environment, will fuse (melt, liquefy) at 20A. This would be true, no matter the length of the conductor. With these specs,...
11-22-20, 08:00 PM
Replies: 4
Views: 187
Posted By Luke M

------------------------ NEC 320.23 (A)...

------------------------
NEC 320.23

(A) Cables Run Across the Top of Floor Joists. Where run
across the top of floor joists, or within 2.1 m (7 ft) of the floor
or floor joists across the face...
11-14-20, 02:30 PM
Replies: 8
Views: 330
Posted By Luke M

My 30 year old home uses back stab receptacles....

My 30 year old home uses back stab receptacles. All the ones I've replaced have been in perfect condition. But 12awg wire and no heavy loads...
10-15-20, 07:18 PM
Replies: 8
Views: 351
Posted By Luke M

"These are permitted by the NEC, correct?" ...

"These are permitted by the NEC, correct?"

When concealed, they are allowed for repairs only.
10-15-20, 03:30 AM
Replies: 16
Views: 596
Posted By Luke M

A digital timer can do the same job. They tend to...

A digital timer can do the same job. They tend to be a pain to program, and they forget the time after an extended power outage. But easier to install than a sensor.
10-11-20, 05:09 PM
Replies: 6
Views: 212
Posted By Luke M

The context is a surface mounted box. You only...

The context is a surface mounted box. You only need "self grounding" for flush mounted. NEC 250.146(a). If you have the Handbook it explains it very nicely.

A case where you can't do this is when...
10-11-20, 01:28 PM
Replies: 6
Views: 212
Posted By Luke M

In most cases you don't even need to run a...

In most cases you don't even need to run a grounding wire to the devices. They will be grounded via the metal box (if the device has non-metalic washers then remove one of them).
10-07-20, 09:32 AM
Replies: 6
Views: 221
Posted By Luke M

Nobody is going to plug anything into the dryer...

Nobody is going to plug anything into the dryer plug besides the dryer. So the tub presents no special risk in my opinion.
10-03-20, 03:44 PM
Replies: 7
Views: 193
Posted By Luke M

This is the symptom of a ground-neutral short....

This is the symptom of a ground-neutral short. (Incidentally, a GFCI or dual function AFCI/GFCI breaker would trip on a neutral-ground short *without* a load).
10-03-20, 02:46 PM
Replies: 9
Views: 324
Posted By Luke M

"Why a terrible practice ? Some main panels only...

"Why a terrible practice ? Some main panels only have one neutral bar and then the neutrals and grounds all connect to the same bar. Nothing wrong with that."

Sooner or later you'll run out of...
10-03-20, 01:52 PM
Replies: 9
Views: 324
Posted By Luke M

I doubt any panel manufacturer approves of this....

I doubt any panel manufacturer approves of this. The bonding screw is only for carrying fault current, not operating current.

The reverse, connecting grounding wire to neutral bus in main panel,...
02-14-20, 11:12 PM
Replies: 11
Views: 491
Posted By Luke M

FYI, this isn't allowed by NEC (except for 4awg...

FYI, this isn't allowed by NEC (except for 4awg or larger). Grounding wire must be green or bare.
01-19-20, 03:52 AM
Replies: 13
Views: 673
Posted By Luke M

There's a general rule (250.4(A)(4)) that metal...

There's a general rule (250.4(A)(4)) that metal that is "likely to become energized" (meaning, likely in the event of insulation failure) must be grounded. Surely that includes sleeves?
01-18-20, 05:34 PM
Replies: 13
Views: 673
Posted By Luke M

There's an exception for "short" sleeves. What...

There's an exception for "short" sleeves. What counts as short? I have no idea.
01-17-20, 07:57 PM
Replies: 13
Views: 673
Posted By Luke M

A true sleeve (tubing open at both ends) doesn't...

A true sleeve (tubing open at both ends) doesn't work nicely with EMT because the EMT has to be grounded, and how would you do that?

If the EMT is connected to a box at one end, then you can...
01-10-20, 06:57 PM
Replies: 23
Views: 603
Posted By Luke M

When a breaker/panel is listed for 100%...

When a breaker/panel is listed for 100% continuous operation, it means it can tolerate the heat generated by running continuously close to its trip point.
01-10-20, 04:23 PM
Replies: 23
Views: 603
Posted By Luke M

If they don't say, then you have to assume it's...

If they don't say, then you have to assume it's the standard 80%-continuous rating.
01-10-20, 02:37 AM
Replies: 23
Views: 603
Posted By Luke M

NEC says the breaker must be rated at 125% of the...

NEC says the breaker must be rated at 125% of the continuous load...unless the breaker is listed to handle continuous loads (most are not, is my understanding). So in this case, use a 55A breaker, or...
12-28-19, 07:00 PM
Replies: 5
Views: 327
Posted By Luke M

Might be a neutral-ground short. A GFCI breaker...

Might be a neutral-ground short. A GFCI breaker would trip without any load, but with AFCIs (except GE), only with some load.
12-17-19, 02:29 AM
Replies: 10
Views: 332
Posted By Luke M

What AFCI breaker, how old? I know Eaton had a...

What AFCI breaker, how old? I know Eaton had a problem with RF sensitivity, could trip for no reason.
12-04-19, 11:10 PM
Replies: 16
Views: 522
Posted By Luke M

Pj already gave the answer but I'll repeat. You...

Pj already gave the answer but I'll repeat. You have an open neutral. Not a short. Check the last working outlet (whether it's a receptacle or light) on the circuit and the first nonworking outlet....
12-04-19, 07:12 PM
Replies: 33
Views: 539
Posted By Luke M

I'm guessing it's a USB receptacle.

I'm guessing it's a USB receptacle.
10-26-19, 04:48 AM
Replies: 6
Views: 485
Posted By Luke M

Box volume doesn't apply for wires larger than...

Box volume doesn't apply for wires larger than 6awg. Instead:

314.28(A)(2) Angle or U Pulls, or Splices. Where splices or where
angle or U pulls are made, the distance between each race-
way...
Showing results 1 to 25 of 44
 


 
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