One of my customers has a TPN board fitted with some Crabtree Polestar MCBs with attached RCDs, and I was wanting to confirm the type of RCD (i.e. AC, A). The RCD modules have either no marking to indicate type, or are marked with the logo for Type AC or Type A. See attached photos.
I'm guessing the ones with no markings are Type AC, and probably an older version before it became common to indicate the type?
And the ones with markings are newer and would have different model numbers, which would reflect whether AC or A?
I can't see any markings on the sides of the RCDs without removing them, which is not something I want to be doing at this time.
I'm guessing the ones with no markings are Type AC, and probably an older version before it became common to indicate the type?
And the ones with markings are newer and would have different model numbers, which would reflect whether AC or A?
I can't see any markings on the sides of the RCDs without removing them, which is not something I want to be doing at this time.
![[ElectriciansForums.net] Identification of Crabtree Polestar RCD type](https://electricians.s3.eu-west-1.amazonaws.com/data/attachments/76/76971-368c314efec17432f4a0f2138a34339e.jpg)
![[ElectriciansForums.net] Identification of Crabtree Polestar RCD type](https://electricians.s3.eu-west-1.amazonaws.com/data/attachments/76/76972-bd1b3948e8f31f65bcf2fda114fa7ecf.jpg)
