Discuss Max Zs values for BS88 types gM in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net
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I believe the gM type operate at 7 times the In rating for a 5 second disconnection.
So a 63A for example would have a max Zs of 230/(7X63) = 0.52 Ohms
So a 63A for example would have a max Zs of 230/(7X63) = 0.52 Ohms
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Just in case back up was required, which it wasn't to be honest, but there may be some that doubt IQ page 23
Catalogue - BS88 Fuse Links Catalog 2009 - Mersen - (Version JPG) - 23
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