Electrical product advice needed

**magicniner** · 02-09-2016

It's covered in this -

https://www.gov.uk/guidance/electric...sponsibilities

You'll need to read the attachments too for the relevant information, I don't assume that smart people can't read and learn things they don't already know! ;-)

I'd look at incorporating a thermal fuse into the power feed such that excess temperature (you'll have to research and determine that) will cause power cutoff, also consider crimped tubular terminations for the mains wires at the connector block.

Regards,
Nick

**cropwell** · 02-09-2016

Originally Posted by magicniner

I'd look at incorporating a thermal fuse into the power feed such that excess temperature (you'll have to research and determine that) will cause power cutoff, also consider crimped tubular terminations for the mains wires at the connector block.

Thanks Nick, I will look through the site and see what is relevant to my glassblower friend.

At the moment, he produces an item http://www.stuartakroydglass.com/new...s/?galAlbum=44 which is a glass sculpture in a solid steel base. His idea was to light it from below with a fairly powerful LED chip. We are at a very early stage in development, with one working prototype. It has to be soak tested to see how the temperature rises on the LED, and to see if the driver is suitable etc.
We hope to get some to show at a Craft Fair in London in 4 weeks time. This will be to gauge interest in the idea. If it flops - well - so be it. If it shines out then we will go further.

Nick - thanks for your sensible input, when I have made a few more bases, I will post some pictures of the innards.

Cheers,

Rob

**Clive S** · 02-09-2016

Rob Have you thought about a 12V or 24V led and feed it from a commercial power brick CE aproved

**cropwell** · 02-09-2016

Originally Posted by Clive S

Rob Have you thought about a 12V or 24V led and feed it from a commercial power brick CE aproved

Yes, but couldn't find a suitable one. The driver we are using on out test rig is this one http://www.ebay.co.uk/itm/2015292070...%3AMEBIDX%3AIT and it has CE marking and IP65 printed on it (???).

**Clive S** · 02-09-2016

Originally Posted by cropwell

Yes, but couldn't find a suitable one. The driver we are using on out test rig is this one http://www.ebay.co.uk/itm/2015292070...%3AMEBIDX%3AIT and it has CE marking and IP65 printed on it (???).

Can you buy one that is CE rated?

This might be a good read: http://www.meanwell.eu/ExclusivePDF/...OVALS-NOTE.pdf

**magicniner** · 02-09-2016

Rob,
I didn't make it clear but my reasoning for the thermal fuse is to use one rated above the temperature which the light unit might reach in a very warm room under normal operating conditions such that the power would cut before anything got hot enough to melt or burn,
Regards,
Nick

**cropwell** · 02-09-2016

1. Thanks Clive, A right riveting read

Actually it may be relevant as the LED driver pictured on page 1 is the one (or very similar) we are using. I realise that CE could mean 'Chinese Equivalent'.

2. Yes Nick, I realised that. We still have tests to do to see temperature rises, but the LED is on a heatsink with plenty of free air (a fan would detract from the artistic aspects). As far as melting is concerned, I have no worries over the cast iron or bronze, but start to get a bit wary about the aluminium. My main concern is the driver and LED chip going pop in flames. There is a 20mm fuse holder which will be furnished with a 1A glass fuse.

No I am not being sarky! I am just knackered after a hard day watching my son do some grafting. I have just had to resort to painkillers (Bacardi and coke). Thanks mates, for taking onboard this issue and providing me with some meat to chew.

Cheers,

Rob

**cropwell** · 04-09-2016

Here's some pics of the lamp base. Don't forget that is only a prototype to test the idea out, nowhere near a finished product, so if you see anything that needs to be changed, please say.

My desk isn't normally like that, I tidied it up to get some space to take the photos