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  1. L

    How to determine the RCD rating in order to comply with 411.4.204

    Hey guys. I am currently studying for 2396 city and guild electrical design exam and I'm stuck on this question. Its asks to determine the residual current rating of an RCD in order to comply with regulation 411.4.204. The circuit in question is a final ring circuit protected by a 20a type C...
  2. Johndingle

    Help with wattage rating of potentiometer

    A potentiometer has a wattage rating of 3 and voltage rating of 100 what would this mean electrically, and how could u transform 25w into 3 watts I'm
  3. I

    Cellar cooling fuse rating

    A cellar cooling system with the main supply going to the indoor unit. Spec sheet gives the following figures... 12.1amps FLA 65amps LRA 32amp fuse recommended My question: Why a 32amp fuse? Have they based this on HRC fuses perhaps and not advised that? Wouldnt a C-curve 16amp 60898 be...
  4. J

    Electrical size conductors and conductor rating

    Hello, I’m building a wood shop. I’m planning on installing 240 and 120 outlets. I plan to connect to my supply panel using a 90 amp breaker. They’re run to the shop is 140 feet. I will use 2” underground conduit. I’m just not sure what size and what rated copper conductors to use. I used...
  5. N

    rcd rating is this suitable

    quick question, 80a/30ma rcd protecting 5 32a circuits 2 ring mains 1 oven 1 shower 1 hob ive been told the shower and hob need upgraded to 40a mcbs is the rcd still suitable one ring main supplys 4 bedroom sockets the other kitchen/living area with 7 sockets.
  6. K

    C2 rating on EICR test report

    Hello Everyone, We are looking to buy this house but the EICR report have a couple of C2's. Any help advice on these is much appreciated. 5.11 - Provision of additional protection by RCD not exceeding 30mA For mobile equipment not exceeding a rating of 32 A for outdoor use only 8.0...
  7. Daniel DD

    Relays, Contactor Rating AC-7a & AC-7b, Relay - Contactor compatibility, RCCB rated current

    Background I live in Indonesia, the voltage for residential buildings ranges from 220 V to 230 V, I need help with the installation of the Schneider products. Here is another link to the thread about the installation of Surge Arrester in Picture 1, which is related to the installation discussed...
  8. S

    IP rating for socket outlet

    Hi guys, I sat a mock exam last week for the written 614 Inspection & testing (C&G L3). All was ok, but there was a question to state the minimum IP code for the front cover of a socket outlet. I'm not sure if this is something obvious or a trick question, but I can't find anything in the...
  9. azimlxp

    Solar panel rating measuring

    Few days ago, I bought a solar panel. It's rating was 6v and 450 mA. But when I measured with my multimeter, It shows around 5.25v to 5.85v and 18mA to 22mA in full sunlight. My Question is - Is measuring current around 18mA to 22mA for per hour or per second?
  10. W

    Calculate the needed power rating and knowing compatible driver specifics?

    how to calculate the needed power rating to light up 6 cool white and 6 white HPL chip like this ? what is the compatible driver specific to light up 6 cool white and 6 white HPL chip like this ? the 2nd image is the circuit assembly the order is even row is 5 watts cool white HPL LED chip and...
  11. F

    what is tabulated Rating of current

    Dear friends, I am learning electrical design and during this process I have seen a new term "tabulted Rating" could you please guide me?
  12. S

    Transformer rating when used as autotransformer ?

    It took me ages to find a suitable transformer that didn't cost several limbs, and while my load at the moment is well within it's rating, I'm curious as to what power rating I can assume for this setup. It's not too important because the total load I have planned on 240V is only 160W, so at...
  13. J

    Power Rating

    Got a pic off a customer of a machine data plate. Bit odd with the two ratings and the other with the + signs in. Can anyone help? Is it startup and running current or something else? Am I also right in thinking the 1 st pic machine is going to pull about 47 Amp per phase? Thanks in advance
  14. B

    Help guys with cable rating?

    Hi Guys, Berty here. I used to be a tradesman looong ago, not a sparky though. I am trying to find out the rating of the cable going to my shower. It is 7 strands - each 1mm in diameter. I thought it was a solid cable for some reason...lol. I fitted it 30 years ago, and now need to replace...
  15. jonperry64

    Cable rating

    Hello. I am replacing out aged 2.4 kW storage heaters with lot20 compliant new ones. One of the new ones is 3.4kw. Our house has an off peak consumer unit with single 1.5mm cables, protected by 16a mcbs, leading from it to each heater. ie one cable per heater. The cables are routed along joists...
  16. W

    Consumer unit IP Rating

    Hello, Just a quick one hopefully. I had a job to test and the board was mounted off the wall by 2 battons of wood, so the back of the board would be about 2 inches from the wall. They have knocked out the 2 rear knockouts on the Wylex board which is an massive for the 8 cables going into the...
  17. B

    SY cable current rating ??

    Hi All got a question regarding SY cable. I have tried to find the current rating for 6mm SY cable and have found a data sheet the GEM cables which states 33 amps in conduit thermal wall and 54amps when in free air. Also seen a few other manufactures state these ratings but a lot stating...
  18. H

    Fused spur rating for electric underfloor heating

    Builder installed 175w / sq metre in an area 6.7 x 3.5. What should the fused spur be rated at and should it have a contractor as well? Am I correct in thinking it is drawing just over 17A therefore 13A fused spur is insufficient? Thanks
  19. M

    Maintaining top entry fire rating/IP rating

    Evening all Had a job yesterday, which I'm back at next week. Job was to install new dual tarriff CU. As can see from photo earthing was supplied off a clamp from incoming metallic pipe which contained the supply cables. As this old CU is double packed out with a frame it had ample space to...
  20. K

    Need Transformaer secondary voltage and amps rating

    I need a help from members. My transformer from JBL Sub Active woofer has failed.It 230 V primary and secondary no voltage details mentioned.It has five wires and center is ground. In Service manual indicates ,First set two wires after bridge rectifier /Filter shows +15vdc,-15vdc (capacitor 35v...

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