On 28/05/2015 23:23, dennis@home wrote:
On 28/05/2015 12:19, John Rumm wrote:

Apparently there are a set of rules you have to follow to ensure you
don't damage a ring.

Why do you persist in repeating this nonsense?


You and dave have both quoted some of the rules in this thread, try
reading what you said about space heating.

Dave correctly pointed out that a general purpose socket circuit is not
the ideal way to power a long term fixed load. This is true and applies
to radial and ring circuits that are feeding general purpose sockets.

General purpose socket circuits are intended to provide flexible power
for a wide range of diverse and distributed loads over a large floor
area. If you decide to power your swimming pool heater from one end of
the circuit, then all you do is reduce that flexibility.

So its fine if I plug two (or more) 3kw heaters into adjacent sockets at
one end of the ring and it doesn't break any of the rules.

Beyond using a bit of common sense, there are no "rules" that a user
need be aware of for any general purpose socket circuit type.

The reality is there is little difference plugging in a pair of said
heaters on a 20A radial, and right at the end of a ring. Depending on
the installation method of the cable, you may get a moderate overload on
a section of cable in both cases. The world will not end, the cable will
not burst into flames. You may degrade the cable with extended use, but
being realistic, how many months of the year do you need to run two fan
heaters in the same room with their thermostats disabled?

All that is required is a bit of common sense from the designer of the
circuit, and a user can do as they please.

--
Cheers,

John.

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