richardimorse ✭✭

Which has inspired me to think of the battery disconnect fuse holders (see picture left) which are great if you have a lot of 12V parallel battery strings say 6 where you want to be able to have an …

We have the correct answer from @jonr @"Dave Angelini" and @mike95490, Lets not forget what a SPD does, it connects Live to ground for a 1P and neutral to ground for a 1P+N for a short peri…

Next question is why are their no 1P SPDs for DC boards, is that because a DC system has no wiring standard like TNC-S to reference and hence the belt and braces approach is used, hey I guess it does…

An electrical engineer told me that 1P Surge protection devices are ONLY used in TN-C and TNC-S installations and using them in a TN-S system or TT system is leaving the system unprotected from surge…

Indeed SPDs are for 2 purposes Utility Transformer Surge and Lightning surge, but I am thinking lightning here, if you use a 1P SPD (hot live only) >> are you protected at a remote outbuilding …