Discuss Zs over max zs in the Industrial Electrician Talk area at ElectriciansForums.net

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K

KNIPEX

Hi guys, done a test today on a ringmain circuit only 4 sockets but the zs was over the max zs as to bs7671.

now this was on a type c rcbo, so as its on an rcbo not mcb i believe this still complies.

if it was an mcb it would have to be changed to type b.

just wanted to double check.

thanks guys.
 
Why are there type c's on a ring final; are there lots of motors on the circuit? What's the Ze and how long are the legs from source to mid ring? I know!! question after question!!
 
Why are there type c's on a ring final; are there lots of motors on the circuit? What's the Ze and how long are the legs from source to mid ring? I know!! question after question!!

all the rcbo are spec as type c 32a 30ma. that usual mate on loads of jobs.

no motors that would be type d wouldnt it???

i say the legs to mid point abot 20m.

havnt got the ze to hand sorry.
 
all the rcbo are spec as type c 32a 30ma. that usual mate on loads of jobs.

no motors that would be type d wouldnt it???

i say the legs to mid point abot 20m.

havnt got the ze to hand sorry.

Normally type B, IMO cause it's on rcbo would say it complies
 

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