ECN Forum Forums General Topics of the Trade General Discussion Area Ask me anything?

Who first asked Doug W's question:
"Why does it hurt when I ....."?
(answer = Zappa)


Can a #2 conductor be installed in parallel with another #2 conductor? If so, under what circumstances? If not, why?

#1 You go on a service call for fixtures not working on outside light poles for a car lot. The problem is a bad time clock feeding a contactor so you replace it. While you were investigating the problem you see these poles are fed with (9) 20 amp circuits from a 120/208 v service .

Now you find that all these circuits share (1) #6 THHN neutral, is this legal?

Yes
No

#2 In a dwelling unit you can install _______ receptacles on a 15 amp circuit.

A 10
B 13
C As many as you can carry in a wheelbarrow
D There is no limit

#3 Which of the following statements about the Grounding Electrode Conductor
(GEC) is false?

A It must be green or marked green
B It must be sized per article 250.66
C It can be orange
D It can be copper, aluminum, or copper clad aluminum

#4 Before the 2002 code gray could be used for an ungrounded (hot) conductor.

True
False

#5 The smallest wire that is allowed to be run in parallel per the NEC is

A 1/0
B #1
C #20
D 500 MCM

I will post the answers later.


Roger

bucketman,

Here's a hypothetical reasoning problem:
(nothing to do with code)

If you have a Light in the Attic and 3 switches in the Basement (1 turns on that light) - How can you fgure out, by yourself, which switch it is and only make the trip up to the Attic 1 time?

Everything works, the Attic is not within sight and no one else is there.

If anyone else has heard the answer to this before please do not let it out right away.


Bill

Great questions Roger.

Thank you Ryan. I like Bill's question too.

oot sruoy ekil I ,WTB

Roger


[This message has been edited by Roger (edited 01-10-2005).]

Roger
I will take a stab at your dubious questions

1. No - 9 x .0133 = .1197 Which equates to a 2/0 Phase conductor. 250.66 2/0 - 4AWG neutral
2. D
3. A
4. True
5. C - 620.12(A)(1)

Pierre

Hello Pierre, I will post the answers tommorow evening.

Roger

I'll give it a shot Roger

#1 Yes
#2 D
#3 C
#4 False
#5 B

Oh the suspense

Okay I'll wait,

Pierre

Q: "In a 2 story dwelling do you need smokes down stairs even if there is no hallway"

A: one on every level.

Is this in the NEC?