Minor works cert

[Golden Graeme]

On the report is the earth fault loop impedance internal Zs or external Ze ?

 

[Nickj]

Zs for MWC

 

[hightower]

On the report is the earth fault loop impedance internal Zs or external Ze ?

If it was wanting Ze it would say "External Earth Fault Loop Impedance"

 

[Golden Graeme]

OK

I have run my test on the furthest socket


LN PSC 0.29ohm 900A
L PE PFC 0.91ohm 253A

All circuits are protected by a 30mA RCD main switch.

 

[hightower]

OK

I have run my test on the furthest socket


LN PSC 0.29ohm 900A
L PE PFC 0.91ohm 253A

All circuits are protected by a 30mA RCD main switch.

It's not asking for Ipf, just simply Zs. So your 0.91ohm figure by the looks of it.

 

[Golden Graeme]

Thanks

Now for a lighting circuit I would usexpect calculated Zs = Ze + (R1+R2)


Ze = 0.17 ohm
R1+R2 = 0.25 ohms

Zs = 0.42 ohms

Is this correct ?

 

[Midwest]

Errrh Graeme, what testing & inspection qualifications do you hold? Or are you doing this as a training exercise?

 

[Golden Graeme]

I have done the C&G 2392 test and Inspection fairly recently.

I am still feeling my way around and just wanted some reassurance.

This is a for an addition of sockets and light fitting.

2 separate jobs / MWC

 

[hightower]

Thanks

Now for a lighting circuit I would usexpect calculated Zs = Ze + (R1+R2)


Ze = 0.17 ohm
R1+R2 = 0.25 ohms

Zs = 0.42 ohms

Is this correct ?

Yes, Zs can be calculated or measured. Measured figures are preferred, especially on socket circuits as it is easy to take a measurement.

 

[Andy78]

I have done the C&G 2392 test and Inspection fairly recently.

I am still feeling my way around and just wanted some reassurance.

This is a for an addition of sockets and light fitting.

2 separate jobs / MWC

Is this as a practice job at your own home or are you doing these jobs at a customer's house ?

 

[Golden Graeme]

Is this as a practice job at your own home or are you doing these jobs at a customer's house ?

A live one

 

[Midwest]

Think I'll stay out of this.

 

[Andy78]

Think I'll stay out of this.

Think I'll join you. I've nothing positive to say.

 

[Midwest]

Graeme, it would appear the course you did, has not have a lasting impact on your memory. Were you given any handouts or publications on your course. If not I would suggest obtaining some, to refresh your memory. I'm not trying to be derogatory, on the face of it your questions seem quite basic. Perhaps it's the way you phrasing them?

NIC do a C&G 2392-10 Level 2 course book, or they did when I did my 2392. It might help you with some of these sorts of questions.

 

[Golden Graeme]

Thanks !

Just not very confident, just didn't want to make a mistake.

Maybe posting was the first ?

 

[westward10]

Thanks !

Just not very confident, just didn't want to make a mistake.

Maybe posting was the first ?

The post wasn't a mistake I think you need a bit of guidance.

 

[Golden Graeme]

Thanks !

Just not very confident, just didn't want to make a mistake.

Maybe posting was the first ?

The post wasn't a mistake I think you need a bit of guidance.

Thanks

 

[Golden Graeme]

Thanks !

Just not very confident, just didn't want to make a mistake.

Maybe posting was the first ?

The post wasn't a mistake I think you need a bit of guidance.

Thanks

 

[Midwest]

Perhaps if you give a resume of your cv/experience, then replies would be accordingly posted. You will need to be brave.