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Other Vintage Household Electrical or Electromechanical Items For discussions about other vintage (over 25 years old) electrical and electromechanical household items. See the sticky thread for details. |
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30th Jul 2021, 3:53 pm | #1 |
Hexode
Join Date: May 2005
Location: Greater Manchester, UK.
Posts: 496
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Mains plug restoration
I often get equipment in for repair with the mains plug exhibiting incorrect fusing, occasionally incorrect wiring and often grubby.
If any parts are broken I will replace with a new plug, otherwise I put the metal parts in vinegar, the plastic parts in dilute bleach. The fuse is usually discarded and a new 1A to 3A fuse fitted. The old plugs have a bit more character than some of the more modern ones. Before and after pics attached. Do others go to this extent or do you just put a new plug on? |
30th Jul 2021, 4:21 pm | #2 |
Dekatron
Join Date: Aug 2016
Location: Colchester, Essex, UK.
Posts: 4,107
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Re: Mains plug restoration
If it's an MK i remove the spiders, clean the pins and the fuseholder, if it's anything else of great age (particularly if the pins waggle from side to side) I bin it.
Spiders seem to like being inside plugs and junction boxes- warmth, electric field or just a convenient hidey hole from which to pounce on prey...? Dave |
30th Jul 2021, 5:03 pm | #3 |
Guest
Posts: n/a
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Re: Mains plug restoration
If I have a grubby plug (or other plastic things) that is (are) mechanically sound I use that "oxy" washing machine stuff, it cleans things like this very well, an overnight soak does the job. SWMBO always has some in stock.
Another cleaning tip for, this time aluminium bits is to boil in water and a dishwasher tab (also in stock). |
30th Jul 2021, 5:24 pm | #4 |
Dekatron
Join Date: Jan 2005
Location: Oxford, UK.
Posts: 17,846
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Re: Mains plug restoration
I fit modern ones with sleeved pins if the kids are likely to be using or disconnecting the set.
I also bin poor quality vintage plugs. But I do indeed save and clean up good quality old plugs, so long as they’re undamaged. Sometimes I replace a failed fibre cord grip with a nylon one from a modern plug, or even a cable tie. |
30th Jul 2021, 5:53 pm | #5 |
Nonode
Join Date: Jun 2016
Location: Bognor Regis, West Sussex, UK.
Posts: 2,296
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Re: Mains plug restoration
I always replace plugs with non sleeved pins.
Peter |
30th Jul 2021, 6:51 pm | #6 |
Dekatron
Join Date: Feb 2005
Location: West Cumbria (CA13), UK
Posts: 6,127
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Re: Mains plug restoration
I assume, Peter, that you mean replacing unsleeved plugs with sleeved ones rather than the other way round?
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30th Jul 2021, 7:34 pm | #7 |
Octode
Join Date: Oct 2011
Location: Wrexham, North Wales, UK.
Posts: 1,457
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Re: Mains plug restoration
I don't mind having old plugs in use around the place for personal use but would never let anything leave this place after repair with one fitted, it has to be a sleeved type by law.
Back to plug cleaning, I use wet wipes for most of it with brasso for the pins.
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30th Jul 2021, 8:00 pm | #8 |
Dekatron
Join Date: Sep 2007
Location: Oxfordshire, UK.
Posts: 4,311
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Re: Mains plug restoration
Are you certain ? If so, which law ?
Cheers, GJ
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30th Jul 2021, 8:16 pm | #9 |
Dekatron
Join Date: Jan 2012
Location: Brentwood, Essex, UK.
Posts: 5,339
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Re: Mains plug restoration
I completely remove the pins where this is possible, and polish them using the rotary steel wire brush I fitted to one end of my bench grinder. It rapidly removes tarnish and burnishes them bright.
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30th Jul 2021, 9:22 pm | #10 |
Nonode
Join Date: Jun 2016
Location: Bognor Regis, West Sussex, UK.
Posts: 2,296
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Re: Mains plug restoration
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30th Jul 2021, 10:19 pm | #11 | |
Dekatron
Join Date: Oct 2003
Location: Croydon, Surrey, UK.
Posts: 7,572
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Re: Mains plug restoration
Quote:
If when servicing, you replace a non-sleeved plug with a sleeved plug, the customer is within his rights to remove the sleeved plug and replace it with his non-sleeved plug if he so desires as long as it is for his own use......
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30th Jul 2021, 10:23 pm | #12 |
Nonode
Join Date: Jan 2016
Location: Stafford, Staffs. UK.
Posts: 2,532
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Re: Mains plug restoration
One comment. I have no idea of the chemistry involved but I do know that bleach affects some plastics. I expect it's not all and possibly only few. But I do know it happens. I've had a number of cistern flush levers snap after using in cistern blocks with bleach, and indeed toilet seats go brittle when bleach based cleaners have been used. Only realised what was going on after starting to see warnings on toilet related bleach based products, and indeed toilet cistern parts mentioning that bleach can do this.
As I say this may be totally irrelevant, but I'd hate to have someones plug disintegrate in their hands.. Hopefully someone can reassure me I'm worrying for no reason? |
30th Jul 2021, 11:10 pm | #13 | ||
Dekatron
Join Date: Sep 2007
Location: Oxfordshire, UK.
Posts: 4,311
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Re: Mains plug restoration
Quote:
Quote:
If, on the other hand, all I did was to replace an electrolytic cap which had reached end of life with an equivalent new one in a customer's piece of equipment, then I don't think there's anything requiring me to go through it substituting unleaded solder for the leaded stuff, or improving the EMI performance, or moving components apart so that the clearance requirements are met, or changing the mains inlet connector, or upgrading the mains plug to a sleeved-pin one is there ? If there is then I'd be interested to know the reference number for it. Cheers, GJ
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31st Jul 2021, 12:11 am | #14 |
Hexode
Join Date: May 2005
Location: Greater Manchester, UK.
Posts: 496
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Re: Mains plug restoration
https://www.pat-testing-training.net...eved-plugs.php
Supports what GJ is saying But I agree it would seem practice to replace non sleeved types. Chris Last edited by unitelex; 31st Jul 2021 at 12:37 am. Reason: Added caveat |
31st Jul 2021, 7:58 am | #15 |
Dekatron
Join Date: Feb 2005
Location: West Cumbria (CA13), UK
Posts: 6,127
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Re: Mains plug restoration
Thank you, Chris, for that link - which gives clear indication of where replacement is and is not required.
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31st Jul 2021, 12:11 pm | #16 |
Nonode
Join Date: Sep 2017
Location: Stockport, Cheshire, UK.
Posts: 2,002
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Re: Mains plug restoration
Usually I replace the plugs on vintage equipment if they are unsleeved.
Normally I just give mine a polish, & remove labels unless they are of sufficient interest.
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31st Jul 2021, 1:42 pm | #17 |
Heptode
Join Date: Jul 2010
Location: Wellington, New Zealand.
Posts: 653
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Re: Mains plug restoration
Interesting - is the old gate in front of L and N sockets operated by the longer earth pin no longer used in the UK? In my day (up to 1970 it was everywhere.
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31st Jul 2021, 2:01 pm | #18 |
Dekatron
Join Date: Nov 2003
Location: Fakenham, Norfolk, UK.
Posts: 4,256
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Re: Mains plug restoration
I was curious as to when sleeved pins became a requirement on new plugs: seems it was 1984. Still a complete mixture in service here, I always ensure an appropriate fuse is fitted but otherwise plugs that are decently well made and fully intact stay in service, and pre-1984 items are likely enough to have unsleeved pins. I'd review the policy if we had any resident or visiting infants.
Paul |
31st Jul 2021, 2:32 pm | #19 |
Nonode
Join Date: Jan 2016
Location: Stafford, Staffs. UK.
Posts: 2,532
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Re: Mains plug restoration
Yes the shutter system is still required, but that's on sockets. The sleeves on plugs is for a different purpose.
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31st Jul 2021, 3:26 pm | #20 |
Heptode
Join Date: Apr 2003
Location: Newton Abbot, Devon, UK.
Posts: 761
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Re: Mains plug restoration
I've always understood that if an unsleeved plug is fitted, it can be left alone. However, if it is removed from the cable for some reason, it can't be re-fitted, and a sleeved one must be installed instead.
Based on what, I have no idea! If I was working on equipment for others to handle and use, I would replace the plug (with a new one) as part of the work. |