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| Thread ID: 113509 | 2010-10-23 01:00:00 | Wiring a light switch | jwil1 (65) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 1147028 | 2010-10-23 01:00:00 | Hi I'm installing a light in a cupboard and want to use a door switch (one that switches the light off when you close the door). I'm using a HPM switch from Mitre 10. I'm a bit confused as to how to connect it up. The switch has 3 terminals, labelled COM, NO and NC. The switch will sit in between the power source and the bulb. Which wires do I connect up to where?? Thanks |
jwil1 (65) | ||
| 1147029 | 2010-10-23 01:04:00 | COM = Common - one wire goes here NO = Normally open NC = Normally closed Since you want the switch to be 'open' or off when the door is closed and 'activating' the switch, you'll want the other wire to go to the NC - normally closed. |
SoniKalien (792) | ||
| 1147030 | 2010-10-23 01:10:00 | Just remind me - which is active which is neutral - blue or brown? Do the 2 neutrals go on the same terminal?? | jwil1 (65) | ||
| 1147031 | 2010-10-23 01:11:00 | Brown or red is active, blue or black is neutral. There should only be one neutral wire in a cable; the third wire (green or green / yellow) is earth, and under normal circumstances should never be linked to the same contact as any of the other wires. Edit: It's possible we're talking about two different things - what you've described sounds like a single-pole switch, which would normally be attached to the active wire only. The earth is often (but not always - depends on the switch type) connected to the switch housing, and the neutral gets passed through directly without touching the switch at all. |
Erayd (23) | ||
| 1147032 | 2010-10-23 01:20:00 | This is a switch though - so there are two earths, neutrals and actives... | jwil1 (65) | ||
| 1147033 | 2010-10-23 01:24:00 | This is a switch though - so there are two earths, neutrals and actives...Oh gotcha - you're referring to the cut ends. The switch should be wired like this: ---N-----------------------------------------Light Socket ---A-------COM NC--------------------Light Socket ---E-----------HOUSING-----------------------Light socket The NO terminal should be attached to nothing at all. If this doesn't achieve what you want (i.e. turns the light off when you open the door) - you may need to use the NO terminal instead, and leave the NC one empty. |
Erayd (23) | ||
| 1147034 | 2010-10-23 03:32:00 | Thanks guys, got it working :) | jwil1 (65) | ||
| 1147035 | 2010-10-23 03:45:00 | Hi jw* Bear in mind that in case of fire caused by your wiring your insurance company will throw a hissy-fit. |
Scouse (83) | ||
| 1147036 | 2010-10-23 04:21:00 | Got it working Do you really want to risk the lives of your family? Make sure that your work is inspected by a registered electrician before you switch in on. (That is the law in this country.) The fact that it seems to work will carry no weight with the Fire Service or your insurance company in the event of problems, not to mention the risk of prosecution. :horrified |
coldot (6847) | ||
| 1147037 | 2010-10-23 04:25:00 | Yeah I've wired up switches before and I'm by no means qualified or even competent but I'm not really sure you should be even trying to put up a fence based on your post history mate. No offence, you just don't seem all that onto it. |
roddy_boy (4115) | ||
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