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
International Wire Colour Codes
by Tjia1981
Today at 09:09 PM
Son of Sparky
by HotLine1
Yesterday at 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
230 or 345 kV transmission lines?
by annemarie1
10/12/16 01:23 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 11
HotLine1 6
renosteinke 6
ghost307 5
Potseal 4
Who's Online
0 registered (), 139 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#184794 - 02/21/09 06:55 PM Voltage Leakage Testing
Ek64911 Offline
New Member

Registered: 09/25/05
Posts: 5
Loc: CT
I was wondering if anyone here does voltage leakage testing. I have a customer that has asked my company to perform these tasks. I know little on this topic and I was wondering if someone could tell me what tools are required and where I could take training?


CT El.Unlimited Contractor
MA Master Electrician
RI El.Contractor

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....

#184949 - 02/26/09 09:15 AM Re: Voltage Leakage Testing [Re: Ek64911]
Zapped Offline

Registered: 10/01/02
Posts: 481
Loc: Huntington Beach, CA, USA
Do you mean voltage drop or current leak? A combination of the two would then be power loss, which is what I imagine they are attempting to find due to suspicion that they are paying for more power than they are actually using.

I'm sure there are some testing devices for more specific, but using an ammeter and a voltage meter you can probably narrow down a potential problem.


- With an active device, such as a motor/fridge/etc., you could take a an ammeter reading near the device and then back at the panel to see if there is a noteworthy difference, indicating a "leak", or draw, somewhere on the circuit.

- You could take an ammeter reading with the device on the circuit inactive to see if there is a current draw when there shouldn't be (again, take readings near the device and then back at the panel).

- You could simply shut off the main disco and see if the meter is still spinning


- Test voltage on a particular circuit at the panel and then at the end of the circuit run to find a difference

- You again try this with the circuit load activated to see if the voltage comes down under load.

Remember your Ohms law - voltage drop increases wattage at a particular amperage. A voltage drop can increase power consumption.

Good Luck!


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