The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Industrail Control Panel bonding per 409.108
by sparkyinak
Yesterday at 03:17 PM
Calling all Non-US members!! (Non-US only)
by aussie240
12/07/16 02:39 AM
Photo Upload Tutorial
by DanK
12/06/16 11:35 PM
Sprinklered equipment 26-008
by bigpapa
12/02/16 04:24 PM
On Delay Relay with Auto Reset
by Potseal
12/01/16 09:59 AM
New in the Gallery:
12.5A through 0.75mm flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 13
HotLine1 9
sparkyinak 8
Texas_Ranger 8
Trumpy 6
Who's Online
0 registered (), 226 Guests and 5 Spiders online.
Key: Admin, Global Mod, Mod
Page 1 of 3 1 2 3 >
Topic Options
Rate This Topic
#57575 - 10/17/05 10:24 AM choke on this
lamplighter Offline
Member

Registered: 10/05/05
Posts: 101
Loc: Clawson,Michigan,USA
I still get amuzed by the number of electricians I meet on the job that don't realize you can't run seperate phases to the same three phase load in seperate conduits.
I've had to explain the concept of building a "choke" to more guys than I can shake a stick at.
It's almost as bad as the concept of splicing copper to aluminum in a split-bolt without the divider.
Anyone else have anything to add about this?

Top
Work Gear for Electricians and the Trades

Work Gear for Electricians and the Trades
Work Gear for Electricians and the Trades
Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc. etc....

#57576 - 10/17/05 12:04 PM Re: choke on this
Roger Offline
Member

Registered: 05/18/02
Posts: 1779
Loc: N.C.
Lamplighter, actually you can do this if you are using non-ferrous wiring methods and the conditions of 300.20(B) are met.

Roger

Top
#57577 - 10/17/05 12:12 PM Re: choke on this
lamplighter Offline
Member

Registered: 10/05/05
Posts: 101
Loc: Clawson,Michigan,USA
I wasn't aware of that but, I've never been in a position where that would come into play either.
I have seen the effects of trying to do it in rigid metal conduit and it wasn't pretty.

Top
#57578 - 10/17/05 12:57 PM Re: choke on this
jw electric Offline
Member

Registered: 09/08/05
Posts: 108
Loc: Asheboro, NC
There is nothing wrong in learning something new, we all do this from time to time. With me the times in between are real short.

One of the hardest things that I had to learn when starting out as a green horn was just where I was at.

It seemed that I was never just where I was supposed to be and was getting yelled at due to this fact.

Well one day I just ask the boss, “Just where am I supposed to be?”

He answered me with this.

If you are not here and you are not there then you have to be somewhere else. Now get over yonder where you are supposed to be. That was thirty seven years ago and the truth be know, I am still lost.
_________________________
Mike

Top
#57579 - 10/17/05 01:55 PM Re: choke on this
iwire Offline
Moderator

Registered: 01/05/03
Posts: 4343
Loc: North Attleboro, MA USA
The company I work for recently repaired a job that the feeders for large RTUs where run in an isolated phase fashion. From the guys there they said it was quite an impressive meltdown.

 Quote:
I wasn't aware of that but, I've never been in a position where that would come into play either.


A large underground service run in PVC is not unusual in my area.
_________________________
Bob Badger
Construction & Maintenance Electrician
Massachusetts

Top
#57580 - 10/17/05 06:18 PM Re: choke on this
mxslick Offline
Member

Registered: 10/24/04
Posts: 785
Loc: Atomic City, ID USA
 Quote:
The company I work for recently repaired a job that the feeders for large RTUs where run in an isolated phase fashion. From the guys there they said it was quite an impressive meltdown.


Any chance they took some pics?
_________________________
Stupid should be painful.

Top
#57581 - 10/17/05 07:58 PM Re: choke on this
lamplighter Offline
Member

Registered: 10/05/05
Posts: 101
Loc: Clawson,Michigan,USA
One of the best melt downs I've ever seen was in a holiday in that we had as a customer.
The maintanance man for the hotel was supposedly going to tighten the lugs on the main, he threw the switch to "off", opened the door, and stuck his bare metal allen wrenck into the lug.
The mechanism supposedly allowed him to open the door without actually shutting down the power.( most likely he used his screwdriver to trip the latch and hadn't really shut it down.)
The lugs were hot, he took a 480v hit, dropped the wrench into the gear and ended up blowing a 3'x5' hole in the F.P.&L. vault wall.
We showed up and overnighted a new switch in from Alabama or someplace. striped the old out, installed new and got the 400 unit hotel back on line in 36 hours.
Damn I was tired!
The maintanance guy survived but,last I heard, was starting to have digestive problems and trouble walking.

Top
#57582 - 10/18/05 06:29 PM Re: choke on this
trollog Offline
Member

Registered: 10/02/04
Posts: 273
Loc: San Diego California USA
>>The maintanance man for the hotel was supposedly going to tighten the lugs on the main, he threw the switch to "off", opened the door, and stuck his bare metal allen wrenck into the lug...<<

no wiggy check? stupid is as stupid does...

Top
#57583 - 10/18/05 09:01 PM Re: choke on this
Attic Rat Offline
Member

Registered: 12/14/03
Posts: 530
Loc: Bergen Co.,N.J. USA
... Sounds like a candidate for the Darwin Award to me.... I feel bad for the poor yutz!!
Russ
_________________________
.."if it ain't fixed,don't break it...call a Licensed Electrician"

Top
#57584 - 10/19/05 04:25 PM Re: choke on this
lamplighter Offline
Member

Registered: 10/05/05
Posts: 101
Loc: Clawson,Michigan,USA
Any of you guys hear about the guy who tried to check a 13.2 line with his wiggy a year or so ago?
He didn't live to learn his lesson.
May have only been broadcast on local news.

Top
Page 1 of 3 1 2 3 >



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals