fusing | Page 2

fusing

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  1. N

    Fusing Fans to manufacturers spec

    Well chaps ive been looking at the manufacturer requirements for fusing down fans ,an every one appears to require only the permernant live to be fused so having words with those nice people at scolmore click you can do it easily with the grid range that doesnt actually look like grid fuse and...
  2. S

    Bathroom fans and switching fusing requirements.

    Hi All, I know this has probably been covered in various forms many times before, but I'm trying to achieve a simple effective solution to a number of problems that bathroom fans have. With reference to bathroom fans, lights,isolation and fusing requirements, does anyone see any problems with...
  3. G

    Grid switch

    Hi all, I am looking to fit a grid switch to the ring main in a kitchen. It will not be pulling much load (extractor, gas hob igniter, dishwasher, and the drivers for led lighting). I plan to wire it just by linking between the supply terminals from the ring. I appreciate it is putting a few...
  4. B

    Fusing the neutral?

    I recently did a fault finding exercise on a Baxi central heating boiler at my sons house. The plumber who installed it had wrongly connected a wireless programmer. An easy mistake for a plumber to make as the installation manual showed two different versions of the same circuit diagram...
  5. J

    Fuse Downgrading

    Is it acceptable to leave a 2 core 10mm2 MICC cable supplying an upstairs flat on a 100A suppliers fuse? (Maxing demand is acceptable and disconnection times are within tolerance.)
  6. P

    Fusing for the Control transformer.

    Hi Am reviewing a small Control Panel from China. The Panel operates a hydraulic scissor lift. One contactor DOL 1ph 230V motor. Limit switches, Up and Down buttons. On the previous model the 230v/24v 50VA control transformer had fuse protection on both sides, 0.3A for the primary and 2 amp on...
  7. J

    cooker connection using dual connection plate, fusing considerations.

    Scolmore do a 45A dual connection plate. (http://www.scolmore.com/documents/switchtoclick.pdf) that has two output connectors. The example photo shows thicker cable as the input, and two thinner cables on the outputs. Should the mcb be rated to protect the smaller cable, or can an over/hob be...
  8. C

    3 amp fusing for extractor fans

    :banghead: Hi All, Just had my NicEic audit and have been picked up on not fusing extractor fans down to 3amp. Normally the installation of extractor fans would come off a lighting circuit via a 3 pole isolator to the fan, unless the fan has been installed utilising a cct other than lighting I...
  9. P

    Fan Fuse

    I have just been given a periodic test report with a code 4 fault: Bathroom fan not fused at 3A. The fan is fed from the lighting circuit which is supplied via a 6a MCB. Does anyone fuse down fans fed from lighting circuits? Does anyone make a triple pole fan isolator with double pole fusing for...
  10. L

    Fusing of extractor fans.

    Hi All, Just had our annual NICEIC inspection and all went OK we passed,:) !! anyway during the conversation it came up that there had been an instance of a 4" fan going up in flames. At the court hearing it came down to either the contractor was at fault or was it the fan. The manufacturers of...
  11. S

    Back fusing/ Protecting a cable 2

    I postedthis question about two weeks ago, If you have a busbar chamber supplied by a large cable fused at say 100A, and then smaller cables taken from the chamber that go to isolators that are rated at 30A. Technicaly the smaller cables are underated but, cannot pull more than their design...
  12. S

    Back fusing/ Protecting a cable

    If you have a busbar chamber supplied by a large cable fused at say 100A, and then smaller cables taken from the chamber that go to isolators that are rated at 30A. Technicaly the smaller cables are underated but cannot pull more than their design current due to the isolators they are connected...
  13. D

    Sub Main and Fusing

    Hi guys and please dont shoot me down. I qualified this time last year, but due to family commitments, I have not been active for nearly a year, so a little rusty. Just started a rewire on a new extension on an old victorian house. Easiest option was to run new 16mm tails and 16mm earth, 5m...
  14. M

    Fusing Factors / Trip

    Fusing Factors BS3036 - 1.8 to 2.0 BS1361 - 1.6 to 1.9 BS88 HBC - 1.25 to 1.27 MCB's up to 1.5 Then Table 7.5 OSG P58 states B Type 3-5x In C Type 5-10x In D Type 10-20x In I understand that if youve got switching surge flouescent lighting C type is favouable over B type if Zs complies as it...

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