DescriptionNZ household ripple control receiver.JPG
English: An Enermet-National Gas Corporation single-phase ripple control receiver fitted to a house in New Zealand. This particular receiver operates at 283 Hz and has two ripple-controlled circuit breakers - the left one controls the storage water heater supply (currently in the on position), and the right one controls the nightstore heater supply (currently in the off position). A tamper-evident seal is fitted to prevent tampering of the circuit breakers by the customer.
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