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Simple, Inexpensive Control #110462 04/20/06 07:01 PM
Joined: Dec 2000
Posts: 4,281
electure Offline OP
Member
The Laundry Room is open from 7AM until 10PM.
The timer on the top left automatically shuts off the washers, dryers, and lights. (The other 2 do nothing)


[Linked Image]


So, how do you turn off 13 circuits with just a 1 pole time clock and 1-3 pole contactor?

Simple... [Linked Image]


[Linked Image]

2017 / 2014 NEC & Related Books and Study Guides
Re: Simple, Inexpensive Control #110463 04/20/06 07:17 PM
Joined: Nov 2005
Posts: 507
M
mahlere Offline
Member
are they really using the "Big Blue Scotchlock Method"?

I thought that was only a theory. An urban legend that instructors would tell students.

Something like bigfoot or mermaids.

Re: Simple, Inexpensive Control #110464 04/20/06 09:32 PM
Joined: Nov 2001
Posts: 745
M
mamills Offline
Member
Bear with me...I'm having a little trouble trying to figure this one out.

Are they turning off the 13 circuits by interrupting the NEUTRAL with that little contactor [Linked Image]?

Mike (mamills)

Re: Simple, Inexpensive Control #110465 04/20/06 09:50 PM
Joined: Nov 2003
Posts: 269
E
electricman2 Offline
Member
Quote
Are they turning off the 13 circuits by interrupting the NEUTRAL with that little contactor ?


Sure looks that way to me. [Linked Image]


John
Re: Simple, Inexpensive Control #110466 04/20/06 10:35 PM
Joined: Dec 2000
Posts: 4,281
electure Offline OP
Member
Yup, they are.
The top pole is being used for the lighting circuit's hot.(the white wire that's so nicely taped black)
The other 2 poles each have a #10 to the neutral bar, and a #10 to the big blue wirenut where the homerun neutrals are spliced.

Re: Simple, Inexpensive Control #110467 04/20/06 10:56 PM
Joined: Feb 2005
Posts: 693
L
Larry Fine Offline
Member
So you can cheat as long as you use one washer on each phase and start them simultaneously!

No, that wouldn't work. Never mind.

[This message has been edited by Larry Fine (edited 04-20-2006).]


Larry Fine
Fine Electric Co.
fineelectricco.com
Re: Simple, Inexpensive Control #110468 04/21/06 08:10 AM
Joined: Mar 2006
Posts: 30
F
FountainGuy Offline
Member
Since the two Tork timers aren't being used, there's plenty of room to add a panel with a bank of contactors and do it right. [Linked Image]

I would have never thought of breaking the neutrals to control anything. Some roads you just don't take, and this creative road is one of them. Someone has a wild imagination!

Re: Simple, Inexpensive Control #110469 04/21/06 10:10 AM
Joined: Nov 2001
Posts: 745
M
mamills Offline
Member
Larry: Should work, just don't get caught in the beginning of the rinse cycle at 10:01 p.m. [Linked Image]

(straying from the point...sorry).

Mike (mamills)

Re: Simple, Inexpensive Control #110470 04/21/06 01:42 PM
Joined: Sep 2005
Posts: 34
K
kdal Offline
Member
[The timer on the top left automatically shuts off the washers, dryers, and lights.]

I can understand Lights.
But why would they want to shut off washers and dryers.
Are these Gas dryers?
And the 120v is just control?
If they are electric 240v and the ground and neutral are actually seperate at the unit.
Maybe they ran the neautrals through the contactor because there would be very little current on the neautrals.
Just controls and no heating elements.
"Important to do the math before you drop
those quarters."

Re: Simple, Inexpensive Control #110471 04/21/06 03:00 PM
Joined: Oct 2004
Posts: 803
mxslick Offline
Member
I wonder how many washer/dryer motors they've burned up by doing this. I'll bet the service renting the machines to these clowns would love to know about this!!

And let's not overlook the panel full of lovely Zinsco tandems!!


Stupid should be painful.
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