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why do spurs exist? Is it because of poor design?

2006-10-11 23:34:18 · 6 answers · asked by bo 2 in Consumer Electronics Other - Electronics

6 answers

On a cooker spur they're there, so you can isolate the cooker, or else you would have locate the consume unit to shut the gas off.

2006-10-15 12:43:06 · answer #1 · answered by Bont11 5 · 0 0

A spur is actually a branch coming off the ring, most modern houses have a seperate feed for the cooker at 30 amps rating or more.
The demands of a modern kitchen mean that more and more separate feeds are needed from the main ring and design is now for a seperate feed for fridges and freezers too. This leaves plenty of capacity on the ring for things like microwaves, mixers, steamers electric knives,dishwashers and kettles, all of which take a high Amperage.
Bearing in mind the place I worked was an electrical retail shop, I was called to find out why the Kitchen fuse kept blowing. They were simultaneously trying to use a kettle, TV, microwave oven, 2000w heater and toaster on a ring designed for 13 amps. Duuuuuuuuuuuuhhhhhhh!!!!! They didn't hear the last of that for months.

2006-10-12 06:51:57 · answer #2 · answered by prakdrive 5 · 0 1

Most of the above answers are wrong.

Cooker/shower/immersion heater etc are NOT wired on 'spurs' but on 'final circuits' ie. exclusive circuits. A 'spur' only refers to a branch from a ring circuit which can supply a single or twin socket OR a fixed appliance via a FCU (fused connection unit) The original idea behind spur wiring was to reduce the amount of cable required to supply a remotely placed outlet, as opposed to incorporating it into the ring cabling. It is preferable to have a minimum number of spurs on a ring and they can be fused or unfused. The term 'Spur Unit' is hardly used in the trade nowadays, as it is now known as an FCU. Final circuits supplying cookers/showers/and other fixed appliances should NEVER be connected into to supply other items.

It is nothing to do with poor design. I would not normally install a socket on a spur, but would extend both sides of the ring main whenever possible.

HALOX. a ring circuit is designed for a total load of 32 amps not 13.

2006-10-12 09:07:39 · answer #3 · answered by jayktee96 7 · 0 1

A spur doesnt necessarily have to come of the ring main. It can be a seperatly run supply for the oven, shower, etc. It is normally for a high power rating device. Something that uses more than the standard applaince. The spur that is fed from the ring main normally is wired direct to the appliance because of safety reasons. Things like inductance / capacitance circuits that could give an electric shock from the plug even when the plug has been removed from the wall.

2006-10-12 07:22:55 · answer #4 · answered by Halox 3 · 0 1

A cooker spur is there so you can isolate the cooker, or else you would have to go to the consume unit to isolate it.

2006-10-12 06:41:01 · answer #5 · answered by Monkeyy 2 · 0 1

Electric Shower, Immersion Heater.

2006-10-12 06:44:02 · answer #6 · answered by Phish 5 · 0 1

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