Another Monday Picture

[brian john]

Somebody was not reading their NEC.

300.3 (B) 1

 

[Buck Parrish]

I don't have my code book. But I am guessing it has some thing to do with smooth surfaces and plastic bushings.

 

[brian john]

Parallel conductors not routed together through a ferrous metal barrier. All they had to do was slot the barrier. Though I would have cut a 8" X 36 in hole and utilized insulaliner.

 

[iwire]

Which side of the metering is the hot metal?

If it is on th supply side they are steeling electricity to heat the building. :wink:

 

[raider1]

I don't have my code book. But I am guessing it has some thing to do with smooth surfaces and plastic bushings.

Take a look at 300.3(B)(1)

Chris

 

[Twoskinsoneman]

Great pic! I really enjoy your IR pics.

I don't have my code book. But I am guessing it has some thing to do with smooth surfaces and plastic bushings.

(1) Paralleled Installations.​

​

​

​

​

Conductors shall be permitted
to be run in parallel in accordance with the provisions
of 310.4. The requirement to run all circuit conductors
within the same raceway, auxiliary gutter, cable tray,
trench, cable, or cord shall apply separately to each portion
of the paralleled installation, and the equipment grounding
conductors shall comply with the provisions of 250.122.
Parallel runs in cable tray shall comply with the provisions
of 392.8(D).​

Exception: Conductors installed in nonmetallic raceways
run underground shall be permitted to be arranged as isolated
phase installations. The raceways shall be installed in
close proximity, and the conductors shall comply with the​

provisions of 300.20(B).

 

[brian john]

Nice handle tie

 

[LarryFine]

Nice handle tie

Wow. :roll:

 

[iMuse97]

Wow. :roll:

Me, too. Thanks for the entertainment, and thanks for the infrared pic.

 

[TOOL_5150]

Which side of the metering is the hot metal?

If it is on th supply side they are steeling electricity to heat the building. :wink:

good one


~Matt

 

[ibew441dc]

Parallel conductors not routed together through a ferrous metal barrier. All they had to do was slot the barrier. Though I would have cut a 8" X 36 in hole and utilized insulaliner.

I would have done the same (8'' x 36"):smile:


Ultimately it should have complied with.....

300.20(B) Individual Conductors. Where a single conductor
carrying alternating current passes through metal with magnetic
properties, the inductive effect shall be minimized by
(1) cutting slots in the metal between the individual holes
through which the individual conductors pass or (2) passing
all the conductors in the circuit through an insulating wall
sufficiently large for all of the conductors of the circuit.

 

[don_resqcapt19]

Brian,
Do you have idea of the current level when the picture was taken?

 

[brian john]

Brian,
Do you have idea of the current level when the picture was taken?

I pulled the Discrepancy Report and the tech did not record the amperage. An over sight on his part.

 

[tom baker]

That is great picture and I thank you for posting it. I've talked about this in my classes, now I have the picture!

 

[don_resqcapt19]

I pulled the Discrepancy Report and the tech did not record the amperage. An over sight on his part.

The reason I asked is because it is my understanding that the equivalent to 300.20 in the Canadian Electrical code only applies to circuits that exceed 200 amps. Based on the number of conductors this was designed for a lot more than 200 amps, but the hot spot is only an 112 or so. I would expect that the current was a lot less than design load.

 

[brian john]

This was a 1200 amp service.

Tom if you want a better digital copy IM me.

 

[LarryFine]

This was a 1200 amp service.

Tom if you want a better digital copy IM me.

Me, too, please? IM sent.