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Old 11-12-2017, 09:13 AM   #21
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Well, I'm an EE, good at reading code, and have a good deal of common sense and experience WRT to residential wiring. But before combing through code....
Where was this "common sense" when you read and ignored the rules for posting on this forum?
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Old 11-12-2017, 09:41 AM   #22
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If your email address suddenly appears in my private message inbox, I would have no choice but to send a PDF copy of the 2017 NEC.
Very interested.

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Old 11-12-2017, 11:50 AM   #23
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Very interested.

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Well I would need your email address PMed to me.


A signed statement of allegiance would expedite things
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Old 11-12-2017, 11:56 AM   #24
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Well I would need your email address PMed to me.


A signed statement of allegiance would expedite things
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Old 11-12-2017, 12:06 PM   #25
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Originally Posted by glen1971 View Post
Why does it seem that most engineers lately figure they can do electrical work? Last time I checked their schooling doesn't give them a trade ticket...
Could it have something to do with people going to college for
4 years , graduating only to find out that the administrators
from their Freshman inauguration were fudging their so called
"high success rate at graduates finding full time employment"
numbers?
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Old 11-12-2017, 04:51 PM   #26
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Just for you Steve:
Quote:
Exception No. 2: Where a portion of a feeder is connected at both its
supply and load ends to separately installed pressure connections as
covered in 110.14(C)(2), it shall be permitted to have an allowable
ampacity not less than the sum of the continuous load plus the noncon‐
tinuous load. No portion of a feeder installed under the provisions of
this exception shall extend into an enclosure containing either the feeder
supply or the feeder load terminations, as covered in 110.14(C)(1).
I don't have the handbook though. Never liked them.
That would be it Hax

The HB shows a pix of a lesser feeder , running at 90C, with 90C terminations in separate JB's

Apparently something of a newer ('17) avenue to the OP here

Although i'm at a loss as to why they revised it in such a manner

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Old 12-02-2017, 11:29 PM   #27
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The feeder tap rules of 240.21are what you need to read.
Thank you sir. that was the code reference I was asking for.
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Old 12-02-2017, 11:31 PM   #28
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Where was this "common sense" when you read and ignored the rules for posting on this forum?
No substantive response. Shame on you.
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Old 12-02-2017, 11:54 PM   #29
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Originally Posted by Dennis Alwon View Post
Are you an electrician or an engineer?

To answer your question I will present a scenario. You have a feeder that is sized for 70 amp with a 100 amp overcurrent protective device. The feeder is protected from overcurrent but what about short circuit or ground fault protection?
That is the essence of my question. Common sense suggests I should oversize conductors

But that's not what the code suggests. The code suggests I can undersize conductors relative to common sense.

Honestly I don't remember why I even asked this question. My general practice is when in doubt, oversize conductors and undersize breakers,
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Old 12-03-2017, 12:16 AM   #30
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Most Bay Area EEs are expert in low voltage digital circuits -- and are green as grass WRT power wiring.

At your rate of pay... just toss this puppy to a licensed EC and recognize that he'll do the work at ten-times your speed.

Even with his 'mark-up' you're miles ahead.

As it works out, there are a LOT more factors in play with power wiring... especially in earthquake inevitable San Francisco.

Everything is great until the building shakes -- and then your work sends the joint up in flames.
Well I suppose there is nothing stopping me from hiring out the job to an ignoramus who has nothing more than a grade-school diploma, 4 years of folklore, a yes-or-no questionnaire, and correcting his mistakes. I don't have enough fingers and toes to count the number of times I've been called in as a consultant to advise the mistakes of a "licensed" electrician.
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Old 12-03-2017, 12:24 AM   #31
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Well I suppose there is nothing stopping me from hiring out the job to an ignoramus who has nothing more than a grade-school diploma, 4 years of folklore, a yes-or-no questionnaire, and correcting his mistakes. I don't have enough fingers and toes to count the number of times I've been called in as a consultant to advise the mistakes of a "licensed" electrician.
And yet you come here to ask a simple question of us ignoramus electricians.
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Old 12-03-2017, 02:21 AM   #32
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Originally Posted by mysterylectricity View Post
Well I suppose there is nothing stopping me from hiring out the job to an ignoramus who has nothing more than a grade-school diploma, 4 years of folklore, a yes-or-no questionnaire, and correcting his mistakes. I don't have enough fingers and toes to count the number of times I've been called in as a consultant to advise the mistakes of a "licensed" electrician.
I didn't say CraigsList.
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Old 12-03-2017, 06:43 AM   #33
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Awesome! Another quality thread

If the guy is so familiar with electrical, why is his username "mysteryelectricity?
"
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Old 12-03-2017, 08:19 AM   #34
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Originally Posted by mysterylectricity View Post
Well I suppose there is nothing stopping me from hiring out the job to an ignoramus who has nothing more than a grade-school diploma, 4 years of folklore, a yes-or-no questionnaire, and correcting his mistakes. I don't have enough fingers and toes to count the number of times I've been called in as a consultant to advise the mistakes of a "licensed" electrician.
So that's all we are, huh?

You have singlehandedly insulted every member of this forum, bashing our intelligence and livelihood. I hope doing so at least made you feel better about yourself.
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Old 12-03-2017, 08:21 AM   #35
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@Cricket, This thread is another example of the moderation department failing.

The first 3 sentences of the thread show that a person who is NOT an electrician wants to wire a panel based on "common sense".

Quote:
Originally Posted by mysterylectricity View Post
Well, I'm an EE, good at reading code, and have a good deal of common sense and experience WRT to residential wiring. But before combing through code....

In short I'd like to wire a 2 space, 70A max subpanel into the lugs of a panel fed by a 100A main breaker.

Common sense (and my historical practice) suggests I need to use wire rated for 100A, based on the ampacity of the upstream breaker.
This is clearly either DIY or him doing unlicensed and unqualified electrical work.
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Old 12-03-2017, 08:26 AM   #36
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And to think I gave the son of a piss mop the answer
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Old 12-03-2017, 10:19 AM   #37
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@Cricket, This thread is another example of the moderation department failing.
This would never happen if I were a moderator.

MTW for Moderator 2018
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Old 12-03-2017, 10:25 AM   #38
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This would never happen if I were a moderator.

MTW for Moderator 2018
While I don't think you should be a mod, I will agree that this would have never happened if you were.
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Old 12-03-2017, 10:31 AM   #39
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@Cricket, This thread is another example of the moderation department failing.

The first 3 sentences of the thread show that a person who is NOT an electrician wants to wire a panel based on "common sense".



This is clearly either DIY or him doing unlicensed and unqualified electrical work.
It takes me a while to recall all the non-sparks that have graced our pro forum Hax, my take is they're IN as long as they've some sort of connection to the trade

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Old 12-03-2017, 10:32 AM   #40
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While I don't think you should be a mod, I will agree that this would have never happened if you were.
I see.
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