Indicator switch with no neutral?

[a-z electrics]

Think i may be onto a loser here but is it possible to wire a simple one way switch and have some sort of indicator like a neon WITHOUT having a neutral? Its for the water pump to push hot water when required to kitchen tap (it's a long way from cylinder). There is already power at the pump, just need a switched live return.
I have a 3 core flex coming from the pump but the switch has to match the other fittings in kitchen and is metal fascia, hence needs a cpc! So my 3 wires are used up..
It may be possible to link a cpc from an adjacent skt but it's all newly plastered.. I know MK do a surround thing with a little led requiring no neutral but this is lit when OFF.
I assume neon grid modules need a neutral? I have a DP neon switch which was bought for it but obviously this needs a neutral.
Worst case is to just use an ordinary rocker switch with no indication but thought I'd ask.
Thanks..

 

[Markyd]

Wrong - do people think that a piece of conductive material with green/yellow indicator sleeving works differently in any way than the other conductors?

It is a metal, the colour is only an indicator put there by the manufacturer for our convenience. If you then decide to place brown/blue/grey sleeving atop of the green/yellow, what possible difference does it make.

Earth core has not been bestowed with some magical curse, it is simple copper with a coloured cover. No decent Engineer would ever consider it any other way. The only consideration might be the reduced C.S.A. if it's PVC/PVC flat twin and skin.

In fact if you wanted to use g/y as line, blue as CPC and brown as neutral - with a good reason, there is nothing stopping you. The regs only state they should be clearly identified at access points and terminations. This could be the word LIVE, letter L, the word LINE, or a coloured section of sleeving.

AND... the regs are a guide, used to supplement/inform. We as qualified Engineers can deviate any way we choose, as long as it is safe, and justifiable.

Danny

Q1.53 Can a single-core cable having green-and-yellow insulation be used for any purpose other than a protective conductor?
No (with one specific exception). Single-core cables having green-and-yellow insulation must not be overmarked or otherwise identified, and must not be used for any purpose other than a protective conductor. The only exception is where such a cable is used as a PEN (combined protective and neutral) conductor, when blue markings must be provided at the terminations.
Regulation number(s):

• 514.4.2
• 514.4.3

 

[brianmoooore]

Neon indicator can be used to indicate a switch is 'off', of course, by connecting across the switch's contacts. Often used to show the position of a light switch in the dark.

 

[MJPD29]

Indeed it can, old thread but mk used to sell a neon indicator for light switches that connected across switch contacts. Haven't seen new ones for a long time but believe they are still available.