Zs reading lower than R1+R2

Help Support Talk Electrician Forum:

squat

Member
Joined
Sep 7, 2016
Messages
5
Reaction score
0
Location
Ireland
Hi all
I am testing final circuits in an office block it is a medium to large installation Fan coil units LCM ( Lighting Control Unit) and floor tracks
I have completed my R1+R2 tests and today I started to test live circuits but the results are coming in lower that R1+R2 I have explained about parallel paths but the engineer over the job will not except these readings

can anyone help
 

Fleeting

Well-known member
Joined
Mar 27, 2021
Messages
700
Reaction score
82
Were your R1+R2 readings done with parallel paths isolated from the cpcs.
 

SPECIAL LOCATION

Trailer Boy - Electrician.
Joined
Mar 28, 2008
Messages
13,633
Reaction score
317
Assuming your R1+R2+Ze are below the max permissible Zs,
Then you could just note your results by calculation...

As per guidance note 3, page 86.. and the note following the reg 643.7.3 ident.
Method 2!!

And stop worrying about your measured Zs
 
Top