Jump to content
Dj's United

YourBigEvent

Community Leader
  • Content Count

    10,290
  • Joined

  • Last visited

Posts posted by YourBigEvent

  1. The original "recommended" fuses for domestic appliances when BS1363 plugs were devised in the late 1940s were 2A, 5A, 10A and 13A. Gradually over the years the 10A rating was dropped as being unnecessary, and the smallest suggested 2A fuse changed to 3A, leaving "normal" ratings of 3A, 5A and 13A. It was only a few years ago (can't remember the precise year, but am totally guessing at early 2000's) that 5A was also dropped as one of the recommended sizes, leaving the present suggestion of just 3A or 13A.

     

    Ratings of 1, 2, 3, 5, 7, 10, and 13A are all still available though.

     

    I don't write the rules !! :shrug:

  2. Sorry, not worded very well

     

    The The Electrical Equipment (Safety) Regulations 1994, states the following:

     

    Typical fuse ratings for 220-240 voltage equipment: up to 750 watts - 3 Amp, up to 1250 Watts -5 Amp, over 1250 Watts -13 Amp.

     

    A lot of Portable Appliance Testing sites state the following:

    For the convenience of users, appliance manufacturers have standardised on two plug fuse ratings- 3A & 13A and adopted appropriate flex sizes. For appliances up to 700W a 3A fuse is used, for those over 700W a 13A fuse is used.

     

    Confusingly, you can still obtain 2 AMP, 5 AMP, and 10 AMP fuses from some wholesalers, in addition to the standard common 3A, 5A and 13A ones mentioned above. For the purpose of this thread, you can forget about 2A and 10A, but most people still believe that a 5A will be OK, which of course it will be (depending on the appliance), but if 'going by book' strictly speaking you should only have 3A and 13A fuses in place, and replace the 5A with either a 3A or 13A depending on the appliance it is going into.

     

    Hopefully that explains it a little clearer.

     

  3. Anything over 700w = 13amp (13 A)

    Anything under 700w = 3amp (3 A)

     

    Let me explain...

     

    The BS 1363 13 A plug has a BS 1362 cartridge fuse inside. This allows the use of 30 A/32 A (30 A was the original size; 32 A is the closest European harmonised size) socket circuits safely.

    In order to keep cable sizes manageable these are usually wired in ring mains. It also provides better protection for small appliances with thin flex as a variety of fuse ratings (1 A, 2 A, 3 A, 5 A, 7 A, 10 A 13 A with 3, 5 and 13 being the most common) are available and a suitable fuse should be fitted to allow the normal operating current while protecting the appliance and its cord as well as possible. With some loads it is normal to use a slightly higher rated fuse than the normal operating current. For example on 500 W disco light it is normal to use a 5 A fuse even though a 3 A would carry the normal operating current. This is because halogen lights draw a significant surge of current at switch on as their cold resistance is far lower than their resistance at operating temperature. However I now believe that 5 A fuses are no longer services, therefore a 13 A would have to be put into the lighting effect, although, as explained not really necessary.

     

    In most other wiring practices the wires in a flexible cord are considered to be protected by the branch circuit overcurrent device, usually rated at around 15 amperes, so a plug-mounted fuse is not used. Small electronic apparatus often includes a fuseholder on or in the equipment, to protect internal components only.

     

    The rating on a BS1362 fuse specifies the maximum current the fuse can pass 'indefinitely' under standard conditions. The fuse will pass higher currents than the rated value for significant periods, depending on how high the overload is. Fuse manufacturers publish tables or graphs of fuse characteristics to allow electrical system designers to specify the correct fuse for the conditions under which it will be expected to operate. One example is the table published by Cooper-Bussmann for their BS1362 fuses. In this publication it states that the fuse is specified to be able to carry its rated current for a minimum of 1,000 hours; 1.6 times its rated current for a minimum of 30 minutes; and 1.9 times its rated current for a maximum of 30 minutes. Therefore, this BS1362 13A fuse is only rated to break its circuit after carrying 24.7 Amps for 30 minutes.

     

    Most of the 'day to day' thing regarding electrical safety can be found in the latest revision of the Code of Practice for In-Service Inspection and Testing of Electrical Equipment. Many of the hard to understand instruction of the earlier version have been clarified and now also includes full colour diagrams including a new illustrated section on typical faults. This book is essential for anyone sitting the City & Guilds 2377 exam.

    The 2377 exam is part of the test you need to carry out PAT testing, although that is all you are allowed to test, it doesn't mean you are a electrician at all, but will do if you want to start a PAT testing company.

     

    The new 2nd edition (27 May 2008). The book covers the basics of portable appliance testing including the legal requirements and practical testing. The book is aimed at electricians, candidates sitting a City & Guilds course as well as a reference for anyone with the responsibility for PAT testing.

     

    Both of these books are great bedtime reading...

     

    Hope that helps a little.

  4. fantastic Saturday gig, like I say left home just after 8am, got home just before 6am. Best day of the year.

    A proper wedding, very expensive, nice people, the bride, sort of owns the venue, which I work at slot, so know everyone etc

    Back there next Saturday too.

  5. Wedding last night, was OK

     

    Wedding tonight in same venue for one DJ

     

    I've got the biggest wedding of the year, arrived at 9am this morning, out by 3am tomorrow morning, so after an hours drive to and from, it's a 20 hour day again.

     

    4 set ups in 4 different rooms, at same venue, one is a simple mixer/music/speaker for outside drinks reception, one is pretty much the same for the wedding breakfast, but with a wireless microphone for speeches etc, and a wireless speaker too, one is for the ceremony, two speakers, music, mixer etc, the other is the main room for tonight. Also have to get a DVD playing on a screen too.

     

    Off for Bistro burger and chips, a drink, and £20 lighter !!

  6. I had one a few years ago, cost to set up was about £5k, that included all equipment, staff uniforms etc etc.

     

    Running cost depends on how well you want to do it.

     

    Can't remember the figures but something like this

     

    Chocolate £50

    Food £30

    Staff ( 2 x £75 ) £150

    Usual business costs, insurances etc £25

     

    Total £250 ish

     

    Can do it cheaper but do you want quality or quantity ?

     

     

×
×
  • Create New...