1. S

    Do I need 2 cables for this project?

    My garage has had only one electrical outlet, I've decided to add 2 more with each feeding off the original outlet. But upon looking at the original outlets wiring I'm now wondering if I need to sets of cable for the new outlets. See images. The original has 2 white, 2 black, and 1 ground...
  2. M

    Advice on insulated plasterboard around electric cables

    I'm currently refurbishing a room and in the process adding some internal wall insulation. The wall has been stripped and my electrician has completed first fix for new sockets and lighting. The walls are solid brick and as I am installing insulated plasterboards, we agreed rather than...
  3. W

    If I have cables installed in the basement of a building do I need to apply Cs and Cd?

    I'm currently doing my cable calcs for my college project and was wondering if the rating factors Cs and Cd would apply for the circuits installed in the basement pool area as the basement will technically be underground.
  4. D

    Fixed wiring Installation - Use of SY & YY Cables

    Hi all, Interested in the groups interpretation of BS7671 with regards to the used of SY & YY cables. We have a commercial installation where we have a power supply installed to an air handling unit/ventilation plant. The power supply supply to the AHU isolator is installed in SWA cable. The...
  5. S

    Bought a multimeter and the cables provided won't attach

    The ends of the cables are completely sealed and there is nothing in the instructures that suggests I have to manually cut the plastic ends off to expose the metal pins inside but I can't understand how else I'm supposed to use them with this or any other multimeter. Is this a thing with probe...
  6. I

    Running Cables in Purlins

    Hello Couldn’t find anything in the forums on this and thought I would have… Large warehouse, minimal power circuits, two or three lighting circuits, max of 5 three phase circuits. Would it be acceptable to run these within the metal purlins at roof level and tied in place or would tray hung...
  7. B

    Should I unclip lighting cables in loft to route over new insulation?

    Hi My 4 bed 2 storey house was extended 2 years ago and completely re-wired, but I am having to upgrade the insulation and board out the loft myself. In the loft the electricians clipped the new 1.0 mm wiring to the joists. There’s no ring, no JBs, it’s LED lighting only and all radial feed. No...
  8. L

    Passing electric cables through walls?

    Hey! I've got one room in the house with a wall socket. I'll be installing a new wall socket on the other side of that wall, passing an electrical cable from one socket to the other for wiring it up. I'm pretty sure the wall has some kind of insulation, should I be adding a tube or cable sleeve...
  9. D

    removal of Virgin cables

    Hello, I am posting to ask what is the best way to remove some Virgin cables that are clipped to the side of my bungalow, and the associated boxes. These have been there since I bought the bungalow but I don't use Virgin, I have no intention to and I now need it all removed because I am going to...
  10. R

    laptop power supply cables - fuses and ratings

    Hi there. I have noticed that most laptop power supply cables have a 5A fuse in the plug, but a 2.5A rating on the clover leaf end of the cable. Is this safe? Surely there should be a 3A fuse in the plug at least, given the cable is rated for 2.5A. The whole industry seems to be happy to...
  11. B

    Safe zones and Earth cables

    I've been told I need to upgrade the main earth bonding to 16mm. The consumer unit is on the wall adjacent to the externally mounted incoming supply box - I basically need to run the earth wire down the corner about 1m and then across the side wall about 30cm then through and into the back of...
  12. K

    RCD protected Cables under Computer Flooring?

    Hi All I’m after some advice, I am doing a restaurant fit out involving a number tables that have hot pots built into the table, for customers to heat/cook their food in the hot broths or stews what have you. These are 3kw and just fed from a fuse spur. The cable run is LSF T&E on tray laid...
  13. I

    Cable calc confirmation required!

    Think I may have been oversizing cables for some three phase circuits... For example, when ive calculated a 11.5V volt drop on a general circuit I've took this as being the 5% allowed but I've just come to realise that maybes this is actually a 2.875% volt drop at 400V Can someone confirm...
  14. fourtytwo

    Correct way to joint 3 x 30 Amp cables, 30A JB not big enough

    Good evening everybody. I have a cooker feed from the CU that is then split under the floor above the kitchen to separate outlets for the hob & Oven. The problem is a standard 30A JB does not have big enough terminals to accommodate the wires. The person who installed this has cut some of the...
  15. J

    Multiple SWA Cables through ducting?

    I have had a kitchen extesion built on an old property (c.1810), which has an unusual consumer unit situation. Part of the property has only a first floor, with a driveway underneath (originally to get carts under for deliveries), with the consumer unit, meter, gas meter etc in a cupboard on the...
  16. pirate

    Why do Norwegians run cables in their downpipes?

    A friend is currently travelling in Norway. He tells me he sees cables run in downpipes everywhere...some are loops, some have leccy tape over the ends, some are Cat5, but loads of cables in downpipes. Can someone tell me why?
  17. Rockingit

    Paint covered cables - further derate or not?

    So I spotted this earlier (venue in Holland) and it got me thinking, be interested to hear people’s thoughts. Painting over cables surely has to effect their thermal dissipation from manufacturers design, so do we apply a further derate, and if so based on what values?
  18. D

    Cables run in Wolf Easi joist system

    Hi Guys Im wiring a domestic dwelling that has the Wolf Easi joist fitted. The central web is great is running services, but how do you fix cables running with and at the normal to the joists? My first thought was mini trunking say 100 by 100, then we should to do grouping calcs. Why trunking...
  19. Pretty Mouth

    Cable buried in a flower bed

    Had a look at a job a few days ago where, should the work go ahead, it would be necessary to run a cable under a flower bed. This is the only option acceptable to the customer unfortunately. The cable will be low voltage, ELV is not an option as the cable will supply power to sockets. The...
  20. mlxmilano

    Help to wire washing machine cables into wall motor protection switch

    Hello, I have two electrical switches in my house that should be connected to the washing machine and the dryer machine, respectively. After having opened them I found 5 cables: black, white, red (connected to the central part) and yellow, yellow-green. I am nearly sure the yellow is the...
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