Length of hook up cable

Many of the problems caused by unreeled EHU's stem from those using 1.5mm sq cable.  At a max rating of ≯ b 16 amp it will heat-up.  Using 2.5mm sq is much safer as with a max rating of 25 amp it offers a considerable safety margin over the 16 amp max output from a bollard.  

The photo I posted above was of a reel with just 1.5mm sq cable.  

2.5 cables can get warm. Any one that has toured in winter, can see the melting snow and that they can dry off the morning dew along their length when in use. 

A reel of 2.5 can also overheat and start a fire, so play it safe and unwind the complete length  and loose any excess along its route or in large open ‘S’ loops under the vehicle, where it wont become a trip hazard.

The cable didn’t catch fire but a fellow camper tripped over it and bashed his head 🤦😂

if you remember the days when a petrol engine had a coil, the coil had wire coiled up to produce high amperage to deliver high current to the distributer.

so leaving your hook up cable coiled up on a reel or not on a reel will produce the same affect

it will produce high ampage and melt the cable after it has left the hook up point and NOT affect the mcb or the rcb

Voltage drop is another factor for not using 1.5mm cable, especially if your further than 25m from the bollard

Also, just because the breaker is rated at 16A, it does not automatically trip at 16.1A and can draw quite a bit more current before the breaker will trip on over current. Thus having the potential to overload the cable.

I was a transformer fitter for many many years and when they did current tests on the transformer they used single wire 25 to 30 mm dia cables and when the power was turned on they were like snakes squirming around