I have a three storey building with 3-phase supply, which is split so there is a single phase on each floor. There are no 3-phase DBs in the building, only single phase (one on each floor).
I've recently bought an 11kW 400V Dafi to see how it performs as a hot water heater. It requires two phases, no neutral, and earth.
How to connect this in terms of fusing / MCB / local isolater without spending more than the cost of the heater itself?
There's approximately 15m cable required from the incoming supply to the Dafi - proposing to use YY 3 core (2 x black & 1 x earth, 4mm).
I've found a 2 pole fuse disconnect isolating switch HR17B-40/200 (32A) that could go just after the main incoming switch and then use a 45A 2-pole switch adjacent to the Dafi.
The HR17B has fuses in it. Any thoughts?
Also, anyone know if a 45A 2-pole switch can be used with 2 live phases, rather than L-N?
I've recently bought an 11kW 400V Dafi to see how it performs as a hot water heater. It requires two phases, no neutral, and earth.
How to connect this in terms of fusing / MCB / local isolater without spending more than the cost of the heater itself?
There's approximately 15m cable required from the incoming supply to the Dafi - proposing to use YY 3 core (2 x black & 1 x earth, 4mm).
I've found a 2 pole fuse disconnect isolating switch HR17B-40/200 (32A) that could go just after the main incoming switch and then use a 45A 2-pole switch adjacent to the Dafi.
The HR17B has fuses in it. Any thoughts?
Also, anyone know if a 45A 2-pole switch can be used with 2 live phases, rather than L-N?