rating

  1. LmarshallSparks

    UK Fire Rating - Rear Knockouts @ Consumer Unit

    Hello All, I understand that when cables penetrate a fire-rated wall entering in to a consumer unit, appropriate fire-stopping measures are required to maintain the wall’s fire resistance. However, in scenarios where the consumer unit is mounted with a clearance from the wall, such that the...
  2. B

    IP2X Rating on DB

    Hi I have come across a new DB that has been installed that requires testing. The tails to the board have come in through a 40mm bush in the side of the unit. They are 25mm tails. Therefore the IP2X rating has been compromised. The board however is in a lockable cupboard and anyone with access...
  3. T

    Ip rating top of consumer unit

    Hi all, if you have a consumer unit with holes in the top bigger than 1mm but it is butted up against the ceiling is this acceptable? as it is not readily accessible? but technically would be if you lifted upstairs floorboards?
  4. T

    FP200 3 phase rating?

    Writing up a sizable EICR, one circuit is utilizing FP200 type cable (don't know the exact brand sorry I know they differ) for a 3 phase condenser, but the only ratings I can find for any softskin cables state single phase AC. Is 3ph AC even permissable?
  5. 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...
  6. 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...
  7. N

    4 pole isolater amp rating

    Bit confused about this. When a simple 4 pole isolater like this plastic wylex one, is rated at 100amp, does that mean, 100amp per phase? So it could have 300amps going through it...
  8. 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...
  9. 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?
  10. arifpatelpduk

    UK Arif Patel Preston Dubai| Is wattage rating of a VFD split between 3 phases?

    Hello friends Myself Arif Patel and I am an Electrical engineer from Dubai. preston, UK.. I just wanted to Know, I've been asked to complete an electrical load list with the watts required for each phase of a 3Ph, 400A, 11kW VFD. The VFD is feeding two motors with a total load of 21A. How many...
  11. 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...
  12. 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...
  13. M

    UK RCD rating in Sub board less than suppy protection

    I have a 40amp RCD downstream of a 50a MCB (10mm csa cable) should the MCB be lowered to protect the RCD from overload? If so why does this not apply to RCD devices in Split Load boards
  14. 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🙈
  15. 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...
  16. MKspark

    IP Rating of trunking in a multi-story carpark?

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

    MCCB Adjustable trip setting - cable rating

    Hi all, In general do you size the cable to the MCCB full trip setting rather than the adjustable setting for the load being supplied. In some cases upsizing the cable can be costly even from 320/400. One of the site engineers is adamant that it should be sized for full trip setting. I'm not...
  18. 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...
  19. 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...
  20. 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...
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