Discuss Two test leads, one port in the Electrical Forum area at ElectriciansForums.net

Welcome to ElectriciansForums.net - The American Electrical Advice Forum
Head straight to the main forums to chat by click here:   American Electrical Advice Forum

I can't understand why everyone is so confused. Sometimes you want to do some test or another from A + B to C. For an IR test that might be L+N to E, or L1 + L2 + L3 to E or whatever, which if you have stackable test leads, you can achieve by putting one clip on each conductor and stacking / piggybacking the leads if they are stackable. It reduces the number of things that might come apart or ping off during the test, vs jumpering with separate croc clip leads. In electronics lab work, joining, branching and daisy-chaining test leads is normal so most bench test leads have a piggyback socket.

I keep a set of touchproof stackable leads and probes in the testing kit to make up whatever configuration is required. They are only for dead tests though as they are not CAT III rated.
 
Ah, Lucien's post has helped. The wording of the question made me think the OP was trying to do some sort of different test by using both ports of the MFT.
 
I can't understand why everyone is so confused. Sometimes you want to do some test or another from A + B to C. For an IR test that might be L+N to E, or L1 + L2 + L3 to E or whatever, which if you have stackable test leads, you can achieve by putting one clip on each conductor and stacking / piggybacking the leads if they are stackable. It reduces the number of things that might come apart or ping off during the test, vs jumpering with separate croc clip leads. In electronics lab work, joining, branching and daisy-chaining test leads is normal so most bench test leads have a piggyback socket.

I keep a set of touchproof stackable leads and probes in the testing kit to make up whatever configuration is required. They are only for dead tests though as they are not CAT III rated.
Oh yeah, that's a good idea :D
 
I was always under the impression that if you individually test L to E, and N to E, without joining them together, you basically do the same test, just without the hassle of having to use piggyback leads or disconnect stuff?
 
But if there are hidden loads on an existing circuit being tested for an EICR, not joining L & N together could inadvertently apply 500V across the load and cause damage. Best to test both to earth at once if unsure.
 

Reply to Two test leads, one port in the Electrical Forum area at ElectriciansForums.net

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

Electrical Forum

Welcome to the Electrical Forum at ElectriciansForums.net. The friendliest electrical forum online. General electrical questions and answers can be found in the electrical forum.
This website was designed, optimised and is hosted by Untold Media. Operating under the name Untold Media since 2001.
Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock