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Nicely put Frank, beyond that there's not a whole lot to be concerned with,
but people tend to worry about overloading, and simply adding up the 'peak' values stated on appliances can give the impression that ratings will get exceeded when there's actually little chance.
The type of Miniature Circuit Breakers used to protect these circuits have a 'response curve' to overload; the bigger the overcurrent, the faster the disconnection.
Therefore a 'short circuit' type fault, where a really big current flows will cause a fast (almost instant) disconnection of the supply.
Conversely, overload of only a few amps can be sustained for many minutes before the MCB disconnects the circuit.
A 16 amp circuit breaker will allow 20 or 30 amps for relatively short periods, and this adequately allows for 'startups', and even for brief periods of load in excess of the rated value.
A sustained load of close to the rated value of the Circuit Breaker can be drawn for a considerable time (an hour or more), so is unlikely to be a problem.
It's a common mis-conception that as soon as more amps flow, than the rated value of the MCB, it will 'trip' off.
Also, PVC cables are generally rated to operate up to 70 degrees C; that's pretty hot, so don't be too worried if a cable gets 'warm'; but probably best to reduce the load, and DEFINATELY uncoil it and allow ventilation, the safe current carrying capacity of a cable reduces by as much as half if it does not have 'free air' to cool.
A cable run through, for example; a void filled with thermal insulation will need to be substantially thicker (even double) not to overheat under load.
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