what’s the best way to upgrade a economy 7 board, currently the is a board for the economy 7 and and another one for everything else, both boards need upgrading.
Assuming each of the storage heaters is connected using a double pole switch and easily disconnected if there is a problem with the heater, I would use a 30 mA RCD main switch consumer unit.
Having said that, under some circumstances the off-peak installation may not need RCD protection, but I would not go down that route, I would provide the 30 mA RCD protection. Only having one RCD would mean that the customer may have to get an electrician in immediately to investigate a problem, so they may be a day without heat if the RCD tripped and they wake up to a cold house, but that’s not really that likely.
Assuming each of the storage heaters is connected using a double pole switch and easily disconnected if there is a problem with the heater, I would use a 30 mA RCD main switch consumer unit.
Having said that, under some circumstances the off-peak installation may not need RCD protection, but I would not go down that route, I would provide the 30 mA RCD protection. Only having one RCD would mean that the customer may have to get an electrician in immediately to investigate a problem, so they may be a day without heat if the RCD tripped and they wake up to a cold house, but that’s not really that likely.
