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!


2017 NEC and Related
2017 NEC
Now Available!

Recent Posts
Parking lot pole light swap....
by ghost307
Today at 04:10 PM
International Wire Colour Codes
by Tjia1981
Today at 12:08 PM
Son of Sparky
by HotLine1
10/20/16 07:43 PM
Speaking of Plugmold ...
by gfretwell
10/17/16 02:37 PM
Broken battery charger? Check for cobwebs!
by gfretwell
10/17/16 02:30 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 12
HotLine1 7
renosteinke 6
ghost307 6
Potseal 4
Who's Online
0 registered (), 255 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#102120 - 03/03/05 06:57 PM House of many motors
Clyde Offline

Registered: 10/17/03
Posts: 31
Loc: Leamington
I had a request the other day that I've seen in the industrial sector, even in the world of commercial, but never in a residential application.

I have a client with a large older home with a recently upgraded service from a 100 amp to a 200 amp. If a house this size were to be built today, a 400 amp service would be required. The problem he has is that he has several large motors in his home, one for a well pump, two large AC units, a few large sump pumps and so on.

He would like a capacitor bank installed to stop the lights from flickering so often particularly in the summer during a rainy season.

Have you guys heard of a product that would satisfy this request. (he's an important client (menaing he's worth money to me)), I'd like to do what I can for him, while at the same time seeing what can be done. Any help you can provide would be helpful.


2014 / 2011 NEC & Related Books and Study Guides
#102121 - 03/04/05 05:38 AM Re: House of many motors
u2slow Offline

Registered: 09/18/03
Posts: 198
Loc: Salt Spring, BC, Canada
Look into using a soft-start - they are available for single phase motors too.

How would you be using the capacitors? I'm thinking it may cause a 'leading' power factor and possibly some extra attention from your POCO.

#102122 - 03/13/05 05:28 PM Re: House of many motors
jdevlin Offline

Registered: 08/07/02
Posts: 402
Loc: welland ontario canada
I have not heard of capacitor doing what you request for AC. On a DC circuit they might help as they would act as a bettery and give the extra capacity.

#102123 - 03/14/05 02:29 PM Re: House of many motors
frank Offline

Registered: 05/29/01
Posts: 361
Loc: windsor ontario canada
I think he means raising capacitance at the motors.It can be done on the air conditioners up to ten % I've also seen hard start kits installed to reduce the flicker effect.I would however stay awaything other than hermetic compressors.A refrigeration wholesaler will have a $80 or so kit sized for the A/C units.But there is still no guarantee.Also make sure the a/c units are staged properly with a "staging thermostat" or there will be power sags.Cycle the units one at a time and see if there a difference.

[This message has been edited by frank (edited 03-14-2005).]


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