Author Topic: 50m extension lead  (Read 1043 times)

0 Members and 1 Guest are viewing this topic.

Offline GeorgeCV

  • Posts: 5
50m extension lead
« on: May 05, 2021, 05:39 AM »
Hi, my garage is about 50m from my house and currently doesn’t have any electrics. I’m going to get an armoured cable run down, but in the meantime I was planning on using a 50m 2.5mm extension lead to run a ts55 circular saw and Ctl 26 dust extractor. Does anyone know if the voltage drop is likely to be too big and I’m in danger of burning them out?

Thanks

Festool USA does not pre-approve the contents of this website nor endorse the application or use of any Festool product in any way other than in the manner described in the Festool Instruction Manual. To reduce the risk of serious injury and/or damage to your Festool product, always read, understand and follow all warnings and instructions in your Festool product's Instruction Manual. Although Festool strives for accuracy in the website material, the website may contain inaccuracies. Festool makes no representations about the accuracy, reliability, completeness or timeliness of the material on this website or about the results to be obtained from using the website. Festool and its affiliates cannot be responsible for improper postings or your reliance on the website's material. Your use of any material contained on this website is entirely at your own risk. The content contained on this site is provided for informational purposes only and does not constitute professional advice.


Offline CeeJay

  • Posts: 345
Re: 50m extension lead
« Reply #1 on: May 05, 2021, 05:48 AM »
Probably not for sheetgoods. If you tried cutting 2” hardwood you might be in trouble.

I used to run a 2000W mitre saw in an unpowered shed on a 30m extension.

I’d get the heaviest extension czz as blue I could find.


Sent from my iPhone using Tapatalk

Offline Alex

  • Posts: 7463
Re: 50m extension lead
« Reply #2 on: May 05, 2021, 06:49 AM »
I use my TS55 + Mini vac on a 40 m extension from time to time and I have never had a problem. With 220 the voltage drop over such lengths is in the single digits, nothing to worry about.

Offline GeorgeCV

  • Posts: 5
Re: 50m extension lead
« Reply #3 on: May 05, 2021, 07:13 AM »
Great, thanks both, was very nervous, as they don’t come cheap.

Offline woodbutcherbower

  • Posts: 40
Re: 50m extension lead
« Reply #4 on: May 05, 2021, 11:01 AM »

Just checked with my site electrician - the voltage drop across a 50m span feeding a load of 3kw is 7.17 volts. His advice would be to do the armoured run in 4mm T&E minimum, not 2.5mm.

Offline GeorgeCV

  • Posts: 5
Re: 50m extension lead
« Reply #5 on: May 06, 2021, 02:15 AM »
Thanks, I was definitely going to go thicker when I get the armoured cable installed. Did your site electrician think I’d get away with the 2.5mm extension lead in the meantime - 7v doesn’t sound catastrophic?

Offline woodbutcherbower

  • Posts: 40
Re: 50m extension lead
« Reply #6 on: May 06, 2021, 11:38 AM »

Yeah you'll be absolutely fine. The combined current draw on the TS55 + CTL26 working flat out is under 2.5kW, so well within the current capability of 2.5mm.

Offline GeorgeCV

  • Posts: 5
Re: 50m extension lead
« Reply #7 on: May 06, 2021, 04:02 PM »
Brilliant, cheers. I’m such a worrier  [smile]

Offline Coen

  • Posts: 990
Re: 50m extension lead
« Reply #8 on: May 07, 2021, 11:22 AM »
First world voltage or 110V?

[tongue] [tongue] [tongue] [tongue] [tongue]

What happened with mandatory location in profile??? [huh]

With 110V (as compared to 230V) the current will double for the same power. With the same cross section wiring, the absolute voltage drop will double (relative voltage drop quadrupled) and the power losses will also quadruple.


Offline woodbutcherbower

  • Posts: 40
Re: 50m extension lead
« Reply #9 on: May 07, 2021, 02:21 PM »
First world voltage or 110V?

[tongue] [tongue] [tongue] [tongue] [tongue]

What happened with mandatory location in profile??? [huh]

With 110V (as compared to 230V) the current will double for the same power. With the same cross section wiring, the absolute voltage drop will double (relative voltage drop quadrupled) and the power losses will also quadruple.

A fair question - but since the OP's name is George (a well-known name for a long succession of English kings [smile]) and he's using terms like 50m as part of his description (instead of 164 feet) - I thought it was fair to assume he was from the UK. Although some of our friends in North America have switched to metric, my experience is that the majority of them still use imperial, since that's all they know - it's second-nature to them and they're comfortable with it. So just to clarify - the figures quoted are based on 230v, not 110v. The reply from Alex also mentioned UK/Euro voltage and the consequent single-digit voltage drop, so he reached the same conclusion.

Oh - and regarding the name 'George' for an English king and my consequent UK assumption, I totally forgot about George Bush (both versions), George Carlin, George Clooney, George Washington, George Lucas, George Foreman, George Patton, George Burns, George Gershwin, George Peppard, and all of the others which I just remembered ............. but all of whom had parents who also named their sons after an English king. All of them - except for George Foreman's parents, that is. In an unusual move, they decided to name their son after an electric food-grilling gadget. Who would ever have known that colonialism would turn out to be such a great, great thing ??   [big grin]

And also (just to confuse matters even further) - here in the UK where we are 100% metric, we still measure our car's fuel economy in miles per gallon, we still weigh ourselves using stones and pounds, we measure our height in feet and inches, and when asked for directions by a stranger, we tell them to take the next turn, a hundred yards up on the left. Or if they miss the turn, they can turn their car around at the next roundabout - he one that's half a mile further up the road. It's opposite the racecourse (where the course distances are measured in furlongs, the course area is measured in acres, and the horse's height is measured in hands), and close to the edge of the sea whose depth is measured in fathoms. And as for women's dress sizes - don't even go there. Just don't.

Happy Friday everyone.
« Last Edit: May 07, 2021, 03:13 PM by woodbutcherbower »

Offline GeorgeCV

  • Posts: 5
Re: 50m extension lead
« Reply #10 on: May 07, 2021, 05:49 PM »
Ha ha, yes I’m in England so all good (in terms of voltage, anyway).

Cheers, happy Friday.

Offline CeeJay

  • Posts: 345
Re: 50m extension lead
« Reply #11 on: May 07, 2021, 07:20 PM »
And George said ‘lead’ not ‘cord’. Def UK!


Sent from my iPhone using Tapatalk

Offline Alex

  • Posts: 7463
Re: 50m extension lead
« Reply #12 on: May 08, 2021, 12:32 PM »
The reply from Alex also mentioned UK/Euro voltage and the consequent single-digit voltage drop, so he reached the same conclusion.

When I read the post I just got a vision of a guy in a red coat and a huge fur hat sipping tea while humming God Save The Queen.