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  1. C

    Best method to calculate 4 core SWA current rating for two pairs of 1PH line conductors

    Hi, I have a Victron Multiplus-II 5kVA inverter/charger with Pylontech US5000 batteries installed in my house along with a 6.8kWp PV array and associated charge controllers. This installation has full DNO G99 approval and was installed to BS7671 and has been running great for about 18 months...
  2. cancatchfire

    What do you think? DC 1A rating??

    I have been asked/invited to "post more", lol, so let me make another post right away. I thought of sth worthy to post, of interest to many, I hope I found sth on the quick... The photo is just to illustrate the switch I'll be talking about. What's visible, I did long ago, serves me well: power...
  3. P

    Advice on new oven installation RE amps/fuse rating

    Hi all We are hoping to upgrade our oven. We currently have a single integrated oven and a separate induction hob. Each has its own red switch on the kitchen wall. The consumer unit has 2 "cooker" parts both labelled as B32. We are hoping to get a larger freestanding electric range style...
  4. R

    Determination of Wire Voltage Rating

    I am curious about voltage ratings on wire. I'm interested in 10-4 for a 25-foot cord that will be carrying 25 Amps at 240 volts. There are two voltage ratings for this wire on Amazon, 300 and 600. Would it be prudent to choose the 600-volt wire since the peak voltage of 240 is 339 volts? Or is...
  5. R

    If a type B MCB doesn't trip unless 5x nominal rating is hit, what's to stop the cable burning up?

    Just reading through my Student's Guide and wondering about nominal amperage. If guaranteed trip is 5x nominal amperage, what's to stop 2.5mm cable on a 20a radial circuit from running at 70a or something and completely destroying the cable/potentially your house?
  6. J

    How to terminate 20mm PVC conduit into a back box/socket - preferred method, whilst maintaing IP rating ?

    Hi All. What is the best/preferred method when connecting 20mm conduit to a back box of a socket on an outside wall ? I am connecting a BG Weatherproof Storm DP 13A socket to an outside wall, fed from socket directly behind the socket from the kitchen. Would using a 20mm female or male...
  7. Calebp43

    Fire rating of fuseboard

    I recently came across a video on YouTube and the guy fit a fuseboard. Very tidy job but I was confused as he used couplers to have the board not flush with the wall and there was massive holes in the back where the cable comes through. 1) doesn't it need to be ip rated so nobody can get there...
  8. Acca dacca

    UK What is the IP rating for this🙈

    Saw this yesterday whilst installing some IT network cables at a prestigious private school as part of a student accommodation renovation project. This is the top of a CU, not sure what IP rating this is to but it don’t comply with BS 7671🙈
  9. A

    Caravan Hook-Up RCBO Current Rating

    I have a small caravan park with 8 pitches. Each have a Rolec Electrical Hook-Up unit fitted with a Rolec 16A Single Pole and Neutral 2 Module C Curve 6kA 30mA RCBO. I've recently fitted meters to these units which display voltage, Current and kW. I was surprised to see that some of the...
  10. MKspark

    IP Rating of trunking in a multi-story carpark?

    Hi, Is there a minimum IP requirement for trunking in a multi-story carpark?
  11. B

    Current rating for tumble dryer?

    I have just bought a tumble dryer that has come supplied with A 13A fuse. The manual says it has come with a special plug, that must be plugged into a 16A rated socket. Surely if I plugged it into a 16A socket and it tried to draw more than 13A it would blow? Can I plug this into a normal 13A...
  12. littlespark

    Best way to improve EPC rating

    Got a customer with a little dilemma. They have a rental cottage attached to their main house, and have successfully let it out for a few years. It sat empty for a while, and they were going to rent it out again, but it now needs a good EPC certificate before they are allowed to. Best rating...
  13. M

    Hey guys, what does for example 300A rating on a 3 pole MCB means?

    Hey guys, what does for example 300A rating on a 3 pole MCB means? Does it mean each phase carries 300A i.e. (Current in R=300A, Y=300A, B=300A) or it represents total currents in all the 3 phases i.e.(Current in R+Y+B=300A)? Please assist, it is confusing me a lot with my calculations of...
  14. B

    IP rating of domestic appliances?

    Fitted a new Hotpoint washing machine in one of the holiday cottages today. I tipped it onto its side to remove the last of the packaging, and was very surprised to find that the entire bottom was open, except for a 40mm or so wide plastic frame all around the outside, and six easily accessible...
  15. S

    DiLOG testers....any good? And is 440v overvoltage rating adequate?

    I'm looking at new testing equipment and quite like the look of the dilog's. They seem to do what every other tester does but they are cheaper and the customer service has rave reviews. I noticed they all only go up to 440v overvoltage whereas the higher end Flukes etc go to 550v. Any ideas?
  16. LEighLeigh

    C2 issues? Consumer Unit & Circuit forms a Figure of 8 Rather than a complete RFC?

    Please help, just had a domestic EICR undertaken, a C2 issue: Consumer Unit does not meet minimum I.P rating, what does this mean and how do I check this out? how expensive to rectify? thanks!
  17. Carolina

    Finding transformer VA rating

    Hello everyone. I'm in training but we haven't seen transformers or how they work yet. I have a transformer here I'm trying to figure out. There are no labels or inscriptions on it. Primary side has 3 wires: black, blue (AC in), yellow (AC out?) and Sec has red and blue. Labeled USA 18AWG so a...
  18. Neptune

    Amp rating on spur - 2.5mm Cable

    Can I please check my understanding on the following. My ring is wired in 2.5mm T&E. It is on a 32 amp MCB and protected by an RCD. I am now contemplating a spur from one of the ring circuits to provide power to an electric hob. The Hob is 2.5KW which I believe, equates to 11 amps. If this is...
  19. H

    Fuse rating confusion

    Organizing my fuse inventory at the plant I came across some Ware 56-50 Amp (FRS style/size). The world of fuses is complicated enough... I cannot find any info on what this seemingly dual rating is. Anyone
  20. R

    Fused fuse board no rcd or breakers eicr rating

    Hello I live in a rental in scotland and have recently had an EICR carried out. I have an old fuse wire fuse board on a wooden plate with no rcd or breakers, I had assumed this would be a C1 or C2 but this came back as a C3. Surely this is incorrect if the plastic fuse boards are C3s surely no...

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