MK K5207WHI 20amp Double Pole Dual Immersion Heater Switch White This products is marked ‘On’ and ‘Off’ against the DP main isolating switch and ‘Sink’ and ‘Bath’ against the two-way SP Selector switch next to it A 230/240volt ac live supply from the consumer unit goes to the Feed side of the Double Pole Main switch (the one with ON & OFF marked on it), on the other side of this Main DP ON/OFF switch is a pre-wired feed that goes to the SINK or BATH switch common terminal which when operated feeds a live feed to either the SINK supply cable or BATH supply cable terminals on the Dual Immersion Heater. The Neutral returns supply from the Dual Immersion heater goes directly back to the neutral terminal on the feed side of the main Double Pole switch
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