Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Suggested Answer
  • Replies 8 replies
  • Helpful Answers 1 Helpful answer
  • Subscribers 39 subscribers
  • Views 204 views
  • Users 0 members are here
Options
You may also be interested in

32A single and 3 phase supplies feeding catering heat lamps via grid fuse modules.

hertzal123

I have been asked wire 300W heat lamps that are mounted over restaurant kitchen hot plates.

The loading of the lamps can be up to 6kw and will include dimmer switches for groups of lamps.

I was planning to supply the lamps via MK grid fuse modules with 13A BS1362 fuses and 2M of 4mm  3 core or 5 core

ho7.Assuming the the fuses will protect the lighting wiring.I was wondering if the grid fuses are suitable in this situation

in particular ,with the 3 phase 32A supplies?Thanks for any advice.

                                                                                              Happy new year,

                                                                                                             Hz

Parents
  • 0

    Happy new year to you too, Hz.

    Those lamps seem to be just the thing for this weather. :-)

    I am a bit confused. Are the lamps on a TP or SP circuit? Are they on their own circuit, or shared with something else? What is the cable from the ceiling to each lamp?

    So 20 lamps @ 300 W each = 6 kW. 2 kW/phase? Could they be on a 10 A MCB?

  • 0 in reply to Chris Pearson

    Hi Chris,

    My customer,the steel fabricators are told if the commando socket in the kitchen is 3 phase 32A or 1 phase 32A.I then make up a lead with 3 pin or 5 pin commando plug to supply the grid fuse box.If 3 phase ,I may use 3 fuse units and a connector block for the neutral to supply the banks of heat lamps.All lighting circuits are single phase.My concern was if the fuse units are suitable for the 3 phase use?

                   Thanks,hz

  • 0 in reply to hertzal123

    Chris,

    They could be on a 10A mcb,but the grid fuse boxes are smaller and neater than a din rail enclosure.The grid box is mounted on top of the lighting gantry

                                                    Hz

  • 0 in reply to hertzal123

    Be aware that some designs of 13A fuse holder don't seem that happy for long term operation in a warm environment at anything too close to the full 13A.  -similar problems arise with fused spurs in airing cupboards and some designs of plug almost anywhere . By all means use 13A fuses as short and overload protection for what are in effect single phase lamps on a 3 phase supply, but perhaps aim for 10A or less per fuse steady loading for a long and cool life.

    Mike.

  • 0 in reply to mapj1

    Thanks Mike

                         Hz

Reply Children
No Data

Community Rules & Guidelines