Recent content by milliamp

Thanks for pointing out the time delay RF, that detail was overlooked in my question, but not in the plan. The set up is going to be as you have described, 100mA S type RCD, MCB (or RCBO, if it existed) for the garage and RCBO for the remaining circuits.

To satisfy John's curiosity, the reason behind the 100mA RCBO was for a feed to a detached garage. The supply is indeed TT and a new board with mainswitch is to be fitted. The garage supply runs through the property in pvc/pvc and then out of the building in SWA, hence 100mA protection for this...

I was looking through the MK C/U design catalogue for a 100mA single module RCBO, when I found a picture of how to configure a board. http://www.mkelectric.com/Documents/English/EN%20MK%20Catalogue/MK142-0610Aen_DOWNLOAD%5B1%5D.pdf I don't think I want to follow their designs! Apart from...

I think that both joints were made with stranded conductors for the experiment. That said, I have not been able to pull a solid joint apart by hand yet.

After a discussion, crimps v screw joints, a work mate and I set out to prove which was the stronger. A jig was set up and a pull applied either side of each joint. The screw terminal joint pulled free with only 15kg load. The crimp joint held beyond 40kg. The only failures I have seen are...

Looks like TN-S. Cannot see the detail, but the earth appears to be made off on the incomer. Check if it runs directly from the service cable into the CU

The "fuse" was installed by the residential site owners. The supply cable is protected by a 63A MCB in a distribution cabinet about 25m from the property. As you can see it is TN-C-S at the metering position.

I was asked to look at installing a replacement shower recently, the customer said he was thinking of a 9.5kW unit. He wanted to know if the existing cable was up to the job, the (very) old unit was 7.2kW. After checking the size of the existing cable I checked on the incoming service fuse...

Recent finding in meter cabinet

Yes BAS, plenty of time. As it is a new piece of kit to me, I was doing a few tests, then comparing the results with my old multifunction and back to the 325. The results were comparable but just seemed to start from a different base value each time I did the Zref bit.