I think it has to do with the duration of the overvoltage that type 2 SPDs are designed to deal with being so short that RCDs won't trip in that time.
I posted their reply here to get others' thoughts on this.
Edit; yes, CPC of SPD connected with a very short lead to the metal casing
I think it has to do with the duration of the overvoltage that type 2 SPDs are designed to deal with being so short that RCDs won't trip in that time.
I posted their reply here to get others' thoughts on this.
Edit; yes, CPC of SPD connected with a very short lead to the metal casing
We're about to take you to the IET registration website. Don't worry though, you'll be sent straight back to the community after completing the registration.
Continue to the IET registration site