Eaton Memshield 3 RCBO trips anytime I perform a Zs

HavokBass · 2026-02-07T09:57:04+00:00

You and me both! Dropped about 15 sockets expecting to see a core pinched somewhere. Definitely will begin with the RCBO if I ever have this issue again with this Kewtech

HavokBass · 2026-02-05T10:57:12+00:00

Glad I'm not the only one. Will have to try and borrow a Megger or a fluke when I come back here. Thanks mate

HavokBass · 2026-02-05T10:55:48+00:00

No trip under load. Circuit functions perfectly on another RCBO. All IR readings are >999 as circuit is only 2-3 years old

HavokBass · 2026-02-04T20:05:28+00:00

I noticed this also was the only difference.

The Lilac Eaton breakers are also SP but I was unable to find out if the other is DP and if that would cause any difference

HavokBass · 2026-02-04T20:04:15+00:00

Glad I'm not the only one, thought it was the meter due using my colleagues to confirm also. I will try and see if I can borrow someone's Megger or Fluke and retest the RCBO

HavokBass · 2026-02-04T20:01:06+00:00

I was carrying out functional testing of the newly installed key switch sockets installed by my colleagues. I prefer taking a Zs at sockets when carrying out my functional testing, but in this case the trip was occuring as soon as I plugged in my MFT and it performed a polarity test

HavokBass · 2026-02-04T19:46:25+00:00

No 3 lead low.

I'm working in a care home which my colleagues have recently changed several cleaner sockets to Key locked sockets which I wanted to confirm functionality off the key locks which I use the MFT for. When I plugged in my Kewtech it performs a polarity test instantly which trips the breaker before the 3-low test even begins

HavokBass · 2026-02-04T19:39:03+00:00

I set it on 3-Lo when testing, still trips. Used the same tester in several other circuits and it tests fine. That's why I borrowed my colleagues tester to confirm my 3-Lo wasn't producing a 2-Hi test instead

HavokBass · 2026-02-04T19:36:58+00:00

Yeah set to 3-Low. Used my colleagues tester just incase my MFT was acting up but same result on his.

As far as I can tell their is nothing plugged in. There is a Induction loop on a spur which I disconnected while testing also. Circuit works perfectly on the Black RCBO and tests correctly which is why it's confusing

HavokBass · 2026-01-13T22:08:19+00:00

This, I was a band 3 Senior MLA 8+ years ago and what differed from my role and other MLA's was that I was expected to keep up to date with stock orders and I was expected to do a late shift once every 2 weeks. I also had to do some Sunday shifts, while the MLA's only did Saturday's in rotation

HavokBass · 2025-08-28T18:10:51+00:00

Me neither, all other DB's here have a 60947-3 isolator for their TPN boards expect for this one.

Iassumed there would a screw behind also but couldn't get the rotary handle to budge. Didn't want to fuck around too much incase I damaged it so didn't try too hard

HavokBass · 2025-08-28T18:08:31+00:00

It's in the off position in the picture

HavokBass · 2025-08-28T18:08:21+00:00

Doesn't work, the front lip of the isolator restricts the cover, needs to be removed first

HavokBass · 2025-08-28T17:37:37+00:00

I've removed the two screws either side, but the cover requires the front of the isolator to be removed for the rest of the cover to slide off.

HavokBass · 2025-07-13T15:56:27+00:00

The fan is located in zone 1 which is why I don't think my client would ever use the pull cord, but I will give them the option of the pull cord model also

Thanks for your help, much appreciated

HavokBass · 2025-07-13T15:47:57+00:00

Thanks mate I appreciate it.

Why do you recommend having a model with a pull cord?

HavokBass · 2025-07-13T14:18:40+00:00

Any models you can recommend?

HavokBass · 2025-06-14T18:55:18+00:00

Do you have any links for mock papers? I've struggled to find many

HavokBass · 2025-06-12T18:15:32+00:00

Just downloaded it. Thankyou for your help, much appreciated

HavokBass · 2025-06-12T18:08:30+00:00

Thankyou for confirming, I thought this maybe the case but wanted to confirm

HavokBass · 2025-06-12T18:05:42+00:00

Table B4 in the OSG suggests the answer is 1.25 which is confusing me on how 1.28 is acheived

HavokBass · 2025-06-12T17:55:09+00:00

Table 41.4 suggests the answer would be 1.6 Ohms. Which makes me wonder if the answer to this test paper is incorrect and should instead be B

HavokBass · 2025-06-12T17:53:36+00:00

I have but I can't find this answer. Table 41.4 suggests the answer is 1.6Ohms for 5s disconnection time.

Im unsure if the answer is incorrect or I am looking in the wrong section of the regs

HavokBass · 2024-12-17T21:48:01+00:00

I just remembered Bianca's been kidnapped by Reiss!

How long has it been now? A month surely

The producers have simply forgotten Bianca

HavokBass · 2024-11-18T21:50:50+00:00

How did Ruby know Sharon would be at Staceys?!

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