[btharmy]

We have all heard someone swear "it's in the code, I just don't know where". People mistake something they were told by their first Journeyman for being a code requirement. Or something from a job spec years ago. What are some of the myths you have heard people swear we're code requirements?

As a first year apprentice, I was told the NEC required to label all j box covers in the field. I later found out it was a job spec.

 

[chicken steve]

The inference that 210.12B mitigates electrical fires

~CS~

 

[Deep Cover]

Two of the most common ones:

1) A J-Box every 100' of conduit
2) No splices in panels

 

[Next72969]

Cant run carflex more than 6 feet

 

[Meadow]

Cant have more than 10 outlets on a circuit.

HVAC disconnects must be fused for all units.

 

[Meadow]

The inference that 210.12B mitigates electrical fires

~CS~

:thumbup: One of the most common urban myths passed around. And reinforced by inspectors

 

[480sparky]

3-way switches are required.

 

[brian john]

Black, Red, Blue
Brown, Yellow, Orange and one electrician argued YBO was against the NEC it had to be BOY

 

[Deep Cover]

Black, Red, Blue
Brown, Yellow, Orange and one electrician argued YBO was against the NEC it had to be BOY

The state of WI actually has a "recommended" color code for 277/480 and 120/208V. Now, what "recommended" actually means, I guess that's up to you.

 

[micromind]

You can never load a circuit to more than 80%.

You can't ever have a breaker larger than the capacity of the wire it protects.

You are required to pre-twist all splices.

#14 is not allowed in commercial or industrial, except for controls.

 

[macmikeman]

Cannot put a panel within 6' of a "water source"........
If there is no metal rebar in your slab, you need to put a 20 length of 1/2" rebar in the footing before the pour and tie the ground wire to it.:jester:
2nd ground rod cannot be any further than 6' from the first.


Those were told to me by inspectors........

 

[brichter]

Recessed cans above showers or tubs must be GFCI protected.

 

[sparky402]

If you play with it you'll go blind

 

[LaZyEyEdPsYcHo]

If you play with it you'll go blind

it'll make your palm hairy too :laughing:

 

[brian john]

If you play with it you'll go blind

Yeah well why do I need glasses

 

[480sparky]

277-volt lighting is cheaper to run than 120-volt lighting.

 

[Awg-Dawg]

If you play with it you'll go blind

Ahhh, much easier to read.

 

[Sparky305]

#14 is not allowed in commercial or industrial, except for controls.

In what situation would you run #14s in commercial or industrial? This is definetely something I thought was in the code. Maybe it's a local thing. All branch circuits we pull are at least #12

 

[macmikeman]

277-volt lighting is cheaper to run than 120-volt lighting.

Factoring total installation and lifetime operational costs I would guess that one is probably true. Ohms laws are great stuffs, but you can put easily twice as many fixtures onto one circuit with 277 v. Less wire to run.


note- BBQ, Wendon, Big John, et al, I said guess, it is highlighted. Google won't mind if you let them rest for a while....

 

[BBQ]

note- BBQ, Wendon, Big John, et al, I said guess, it is highlighted. Google won't mind if you let them rest for a while....

Don't question mikes posts, he feels victimized.