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Search took 4.16 seconds. Search: Posts Made By: charlie b
Forum: NEC Yesterday, 06:32 PM
Replies: 32
Views: 358
Posted By charlie b
I disagree with your inpector. You don't have...

I disagree with your inpector. You don't have "wall space," unless you first have a wall. You don't measure kitchen cabinets along the floor line, because a kitchen cabinet is not a wall. If there...
Forum: NEC Yesterday, 04:24 PM
Replies: 38
Views: 641
Posted By charlie b
Not at all. As Mike pointed out, 225 has a...

Not at all. As Mike pointed out, 225 has a limited applicability that does not include the present discussion. The fact that something is allowed under 225.7 does not mean that the same thing is...
Forum: NEC Yesterday, 04:20 PM
Replies: 17
Views: 207
Posted By charlie b
You can't find it, because it is not there. ...

You can't find it, because it is not there. 210.8 gives a couple exceptions that deal with supervised locations. But none apply to this installation.

You give good reasons that it would be...
Forum: Electrical Calculations/Engineering Yesterday, 04:11 PM
Replies: 2
Views: 64
Posted By charlie b
That is correct. Either set the breaker to trip...

That is correct. Either set the breaker to trip at 500 amps (if it is adjustable), or replace it with a 500 amp breaker, or bring some more aluminum into the party. That is correct. The wire from...
Forum: NEC Yesterday, 03:54 PM
Replies: 38
Views: 641
Posted By charlie b
Turn off both circuit breakers for a single...

Turn off both circuit breakers for a single circuit (of the multi wire variety), and one of the conductors related to the circuit still carries current. I can't get there.:-?

The general rule of...
Forum: Safety Yesterday, 02:54 PM
Replies: 2
Views: 68
Posted By charlie b
A commonly held, and absolutely wrong belief is...

A commonly held, and absolutely wrong belief is that current will take the shortest, or least resistance, path to ground. That is wrong on two levels. First, current is not seeking a path to ground,...
Forum: NEC Yesterday, 12:06 PM
Replies: 38
Views: 641
Posted By charlie b
I disagree. I think none of them do. If I open...

I disagree. I think none of them do. If I open both breakers 1 and 3, there will still be current flowing in the neutral wire that is part of circuit 1-3. Thus, the set (wire 1 + wire 3 + the...
Forum: NEC Yesterday, 11:54 AM
Replies: 14
Views: 165
Posted By charlie b
The only related requirement is that each tenant...

The only related requirement is that each tenant must have access to the overcurrent devices serving outlets in their apartment. There is no rule that says that no other tenant can also have access...
Forum: Exam Preparation Yesterday, 01:25 AM
Replies: 1
Views: 42
Posted By charlie b
Duplicate. Closed. Please reply here: ...

Duplicate. Closed. Please reply here:
http://forums.mikeholt.com/showthread.php?t=120054 (http://forums.mikeholt.com/showthread.php?t=120054)
Forum: Electrical Calculations/Engineering 11-19-2009, 07:04 PM
Replies: 20
Views: 521
Posted By charlie b
We don't learn this stuff in EE school, Rob. The...

We don't learn this stuff in EE school, Rob. The NEC is not in the BSEE curriculum.
Forum: Electrical Calculations/Engineering 11-19-2009, 07:02 PM
Replies: 20
Views: 521
Posted By charlie b
And tell him, from me, speaking as an EE myself,...

And tell him, from me, speaking as an EE myself, that in a disagreement between an EE and a non-EE, on an electrical subject, there is no rule that says the EE will be right because he is an EE. ...
Forum: NEC 11-19-2009, 06:42 PM
Replies: 38
Views: 641
Posted By charlie b
Thanks, Roger, that helped a bit. I see you...

Thanks, Roger, that helped a bit.

I see you got that figure from the handbook. I see that the handbook has a similar figure for a three-phase panel. But I also see that the handbook's...
Forum: Exam Preparation 11-19-2009, 06:34 PM
Replies: 22
Views: 211
Posted By charlie b
I don't have a problem with that. I took the...

I don't have a problem with that. I took the Administrator's Exam, without ever having done any electrical installation work. I have the license, and I could set up a contracting business, if I...
Forum: NEC 11-19-2009, 06:30 PM
Replies: 5
Views: 112
Posted By charlie b
Not enough information was given here. Each...

Not enough information was given here. Each tenant might already have that outlet. The building entrance might already that outlet, and it might be in use for some other sign. That does not mean...
Forum: NEC 11-19-2009, 06:24 PM
Replies: 38
Views: 641
Posted By charlie b
Sorry, Don, I wasn’t clear. Not what I said (or...

Sorry, Don, I wasn’t clear. Not what I said (or tried to say). The definition of branch circuit requires the use of one, and only one, overcurrent device. If you have more than one OCPD, you do not...
Forum: NEC 11-19-2009, 02:24 PM
Replies: 38
Views: 641
Posted By charlie b
It's tricky, but I think it is there. 210.2...

It's tricky, but I think it is there.

210.2 explicitly states that, "Branch circuits shall comply with this article." The "article" is the entirety of 210, not just 210.2. Therefore, if a branch...
Forum: NEC 11-19-2009, 01:43 PM
Replies: 38
Views: 641
Posted By charlie b
If you leave a 3-phase panel with three...

If you leave a 3-phase panel with three ungrounded and one grounded, you have a MWBC. If you leave the same panel with 4 or more ungrounded and only one grounded, you have a violation. Or am I...
Forum: NEC 11-19-2009, 01:41 PM
Replies: 38
Views: 641
Posted By charlie b
Please help me out here. I don't understand what...

Please help me out here. I don't understand what 225.7(B) is talking about, and I don't see its relationship to the present question. :-?
Forum: NEC 11-19-2009, 01:03 PM
Replies: 38
Views: 641
Posted By charlie b
This doesn't sound right. But it may be that I...

This doesn't sound right. But it may be that I simply do not understand the description of the installation. Is this what you are trying to describe:

In the panelboard, you have some number of...
Forum: Electrical Calculations/Engineering 11-18-2009, 07:27 PM
Replies: 11
Views: 196
Posted By charlie b
I am not certain what the building codes say on...

I am not certain what the building codes say on this subject. As a matter of normal design practice, however, my rule of thumb is that a person can be expected to get from the inside of the room...
Forum: Electrical Calculations/Engineering 11-18-2009, 05:09 PM
Replies: 11
Views: 193
Posted By charlie b
A key difference between the 3-pole and the...

A key difference between the 3-pole and the 4-pole relates to the connections of the equipment grounding conductors. Using the 4-pole allows you to make the backup generator a "separately derived...
Forum: Electrical Calculations/Engineering 11-18-2009, 05:04 PM
Replies: 10
Views: 185
Posted By charlie b
Sorry, but no. You can't use the 90C column for...

Sorry, but no. You can't use the 90C column for ampacity, unless all the components in the circuit are rated for 90C. The one that generally gets you is the terminations. They are seldom rated...
Forum: Exam Preparation 11-18-2009, 12:14 AM
Replies: 22
Views: 211
Posted By charlie b
By the way, I took a look at the L&I web site,...

By the way, I took a look at the L&I web site, and was able to find the answer within one minute.
Forum: Exam Preparation 11-17-2009, 11:59 PM
Replies: 22
Views: 211
Posted By charlie b
I might wonder how you came across that little...

I might wonder how you came across that little factoid. Your profile's zip code puts you on the other side of the country. :confused::grin:
Forum: Electrical Contracting and Estimating/Management 11-17-2009, 11:50 AM
Replies: 50
Views: 1,386
Posted By charlie b
IF you finish the job without yourself having...

IF you finish the job without yourself having suffered any injury,




AND IF when you turn it on, there are no sparks,
Showing results 1 to 25 of 500
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