Welcome. I will stay with you until the situation resolves. I hold questions open after positive ratings to allow for unlimited follow up.
This is not an answer so far, I will switch us to Q and A format... our chat server is apparently having problems.
thanks for the electrical info regarding the 'grounded neutral'. It's not something I have come across before, but it explains a lot. In Australia, mains power is nominally 240V, although in Western Australia, where I live, it is around 250V. Yesterday's test gave a reading of 246V.
The heater is rated at 240V/10A, and the circuit breaker also 240V. The heater has two wires to the element, a red (live) and a black (neutral), which are connected through a temperature limiting cut-out.
My main concern was that the heating element had not developed a fault, and had started grounding out. Your answer suggests that it is operating as designed. Therefore, the culprit would appear to be the circuit breaker, but if you have any other suggestions I would appreciate hearing them.
Hello again, I had mistakenly assumed you were in the USA. The color codes for wiring in Australia (and other countries) is at this link, about 1/4 of the way down the page CLICK HEREMy statements regarding the white neutral are INCORRECT for Australia.It does look like the circuit breaker may be too small for the load, the voltage rating on the breaker is not the relevant issue here..... it is the amperage that trips the breaker... In this case your load is called out at 10 amps, so the breaker should be 15 amp rated, and the wire sized accordingly, size 12 AWG minimum. Metric size2.59 mm to 2.05 mm the smallest permissible size.Phil It will be best If opt out, and we can see if an electrical expert from Australia is available to assist you.
thanks once again. I don't know that we can go much further. Apart from the wiring in between, it can only be either the heater electrics or the circuit breaker. If the heating element is working as it is supposed to, that only leaves the circuit breaker. And to that end I have asked the electrician who installed it to replace it with another, to see whether the problem continues. However, this may not be for another day or two (or longer with the weekend upon us). I'll let you know what happens.
the breaker is rated at 16A.
thanks for the assistance. The problem was the circuit breaker. We bought a new one and installed it, and all is working OK. No further questions.
Once again, many thanks.