Which begs the question, did the guys who installed the SPD have spare busbar on the van?
I assume that enclosure was sold as a two way consumer unit, so the busbar is long enough to connect two protective devices to a main switch.
So when they came to install the SPD was the decision not to connect the neutral ultimately based on avoiding a trip to an electrical wholesalers with the thought being it doesn’t really need the neutral connection.
Or did they get a hacksaw and cut off the fourth pin having made a design decision that the neutral connection is not required.
My money would be on it being “It doesn’t really need it and it will save a trip to a wholesaler”.
Which begs the question, did the guys who installed the SPD have spare busbar on the van?
I assume that enclosure was sold as a two way consumer unit, so the busbar is long enough to connect two protective devices to a main switch.
So when they came to install the SPD was the decision not to connect the neutral ultimately based on avoiding a trip to an electrical wholesalers with the thought being it doesn’t really need the neutral connection.
Or did they get a hacksaw and cut off the fourth pin having made a design decision that the neutral connection is not required.
My money would be on it being “It doesn’t really need it and it will save a trip to a wholesaler”.
