MK Sentry 100A Switch Disconnector recall

[oo7]

Hi guys.

Has anyone had to change a MK Sentry 100A Switch Disconnector on the product recall yet?

I went to check one of my MK CU I fitted and found that it's part of the recall. Now I need to replace the switch and, by request of MK, fill out a minor works ticket for the job.

My question is what the hell am I meant to test in regards to the circuit details and test results. Phoning the "hot line" isn't very helpfull as the computer says "no".

Many thanks,
Chris.

 

[EFLImpudence]

what the hell am I meant to test in regards to the circuit details and test results

Not much

Perhaps they just want your details and a record of where it is.

 

[Lectrician]

I have one to do when they send "the pack" out to me.

It was a CU I fitted for a customer, and he sourced it himself from SF.

On the phone to them, they say the only issue with the switch is the plastic around the terminals. If you over tighten the terminal screw you can damage the plastic on the side of the switch and this then prevents the terminal from being done all the way up.

Apparently you would know you have done this, and would know the terminal is not tight, but because some bodgy electricians or installers have done this and not replaced the switch, they have overheated at the terminations.

I don't believe they are a fire hazard unless you have damaged them when tightening the terminal up, and then just thought "ah sod it, it will be alright".

 

[ban-all-sheds]

My question is what the hell am I meant to test in regards to the circuit details and test results.

As the switch contacts are part of the path, how about Zs?

 

[securespark]

I would do a Ze or Zs and a global IR putting L&N together.

 

[ban-all-sheds]

Aren't Ze and global IR normally done on the "wrong" side of the switch?

 

[securespark]

Yeah, Ze normally done on incoming supply. But this in an incomer isn't it?

As for global IR, I do that test when swapping out faulty RCD's.

Got one board, a twin RCD board, both RCD's failed....

 

[ban-all-sheds]

Yeah, Ze normally done on incoming supply. But this in an incomer isn't it?

But on which side of the incomer do you do the test?

As for global IR, I do that test when swapping out faulty RCD's.

And on which side do you do that test?

 

[securespark]

Ban, you're waffling, matey!

Get to the point!

Isn't it obvious from what I wrote where the tests are conducted?

Am I missing something?

My brain hurts.

No doubt you'll reveal all.

See you tomorrow.

I mean, later.

 

[oo7]

Ok, thanks guys. I still can't see the point of testing a circuit but I think I'll just test a ring to satisfy the requirement to fill out in ful a MW ticket.

 

[ban-all-sheds]

Ban, you're waffling, matey!

Get to the point!

Isn't it obvious from what I wrote where the tests are conducted?

Am I missing something?

Can't see the point in doing any tests which don't involve the replaced item.

 

[oo7]

That's the thing, nothing you can test on a circuit has anything to do with the main switch. Ok maybe Zs but now we're working live for an "unnessersary" reason. Testing a global IR isn't really going to involve the main switch.

I'll just do the job as if I've made an alteration to a ring main and test there.

Thanks again guys.

 

[ban-all-sheds]

I think it's stretching it a bit to call plugging a tester into a socket "working live"...

 

[oo7]

Lol. That's why I will test a ring final rather than a lighting circuit.

 

[EFLImpudence]

Elfan safe tea gawn maad.