(there was worry about damage from e.g. nearby lightning, though one comment mentions no recorded trouble).
The excellent quality Crabtree E-60 model V.O.E.L.C.B. has a lighting protection spark gap (discharge gap) installed internally in parallel with the trip coil.
In the mid to late 70s, a Crabtree 100 Amp E-60 model, without overload protection, cost approximately £8.40 plus VAT. VAT tax was half the rate it is today at 12.5 per cent.
Z.
(there was worry about damage from e.g. nearby lightning, though one comment mentions no recorded trouble).
The excellent quality Crabtree E-60 model V.O.E.L.C.B. has a lighting protection spark gap (discharge gap) installed internally in parallel with the trip coil.
In the mid to late 70s, a Crabtree 100 Amp E-60 model, without overload protection, cost approximately £8.40 plus VAT. VAT tax was half the rate it is today at 12.5 per cent.
Z.
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