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maximum

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  1. J

    Maximum LED load on a Lutron Maestro Pro Dimmer

    I have Maestro Pro dimmers throughout my home. I have remodeled the kitchen and want to upgrade the lighting. I desire to put 15 10-watt led can lights on one Maestro Pro led dimmer. The Lutron representatives say "no problem" but I would like to make sure that is the case before I run all...
  2. Zdb

    Maximum kW fixed load on RFC

    So if 2kW is the maximum fixed load for a 2.5mm RFC. What would you say the maximum fixed load on a 4mm RFC should be? If different.
  3. P

    Maximum spacing supports for metal trunking HELP

    Evening people, Was hoping someone could help me with this problem I'm having. I am writing up my portfolio NVQ and writing about installing metal trunking. On the OSG page 143 table D4, column number 1 list the trunking sizes by cross sectional area. The trunking I have used was 100mm x...
  4. Mark Wright

    Maximum Branches from Socket on Radial that's acceptable.

    What would be the maximum amount of Branches from a Socket on a Radial that you would find acceptable? I've seen 4 I'm not talking about Design or being Tidy or keeping it nice for testing but how many would you say No that's just too many?
  5. newfutile

    Maximum ZS values GN3

    On page 142 of the latest Guidance Note 3 it list a 16 amp type B max ZS as 2.15, however i think 2.2 is the real value, it also states that at 16 amp type C is 1.1 ohms which is correct, but a type B should be double the value of a type C. anyone else have a view on this?
  6. H

    Maximum Current Draw

    Hi I am looking at buying 2 NEC PA653UL projectors to stack them to create 1 projection image, but when looking at the input current specification I am in doubt if this is going to work. The input current specification states that it can draw from 4.5A to 10.2A, which seems unnaturally high...
  7. M

    What is maximum distance I can run 12 gauge wire to a shed?

    Hello, Need some advice. I have a 20amp breaker with 12g/2 underground feeder wire running to an outdoor GFIC outlet. 38 feet from breaker box to where it leaves the house and then 32 feet buried 24 inches deep (no conduit) to the 20A GFIC outlet. So from breaker box to outdoor outlet is a...
  8. D

    UK Maximum demand

    Hi All I am doing my assignment and one of the tasks is to create a fuse board schedule showing circuit breaker ratings any assumptions must be stated with reasoning given. using these circuits calculate the maximum demand of the installation Can someone tell me if it is right So without...
  9. N

    Door shutter rcd!

    Hello I have an oportunity to take one big commercial job! there would be 4 -3 phase door shutter!i think 16 amps socket! should i put rcd on each shutter or one enought for 4 shutter? should i protect the ciruitS by rcd? the cable will run on very high level on the cable tray ! if yes ,where...
  10. K

    Can anyway help with Radial circuit maximum floor area help?

    Hi everyone I am doing level3 design andI have a circuit to design but I have confusion with radia circuit maximum floor area to understand? I have a socket to feed on the design and floor area according to my knowledge is Length multiply width so in that case it exceeds 75 m square so I am...
  11. S

    Maximum Service voltage of ACBs(air circuit breakers) .

    Can we use a ACB rated for insulation level of 1000v, and 690 volt serivce voltage at, 800volt. For example ABB sace E1.2N , Can it be used at 800volt AC?
  12. C

    Maximum Disconnection Times

    What is the reasoning behind having a 0.8 disconnection time for up to 120 volts Uo, but it then jumps to 0.4 seconds as soon as you go over it? Wouldn't it be better 0.8 seconds for 150 volts Uo and under, 0.4 seconds 150 volts and over Uo?
  13. ThatMatt72

    UK Can't get within maximum load when applying diversity

    Hi all, I wonder if you might chuck in your 10 cents worth on this on? I have been asked to install electric heating in an office up on the 4th floor of a building. I've looked at the layout of the room, with regards of seating etc and after consulting with the occupiers have decided on the...
  14. A

    Maximum demand calcs

    Hi guys. Just looking at how people work out their max demand for supplies to consumer units. Looking at a board change with 7 circuits and going by osg working out to be over 80a I have heard of the 40% rule of total load but was wondering if any others have a different method. I cant see an...
  15. Michael J

    The maximum value for Zs on a TT system is 50/I delta. So for a 30mA RCd is 1667 ohms

    why is this not the case if the final circuits on a TN-S or TN-C-S system are protected by a RCD? Funny what you think of when you can’t sleep
  16. dc-electrix

    Maximum demand and diversity electric flat

    Hi All, Making some alterations in an existing flat and scratching my head about required supply to flat. It is all electric, 1 bed, 1 bathroom. Electric shower 9.5kw Instantaneous Water Heater 9.5Kw Cooker Oven & Hob 6Kw 1 Ring main 3 Electric Heaters...
  17. D

    Maximum Luminaire Weight Supported by Plasterboard Ceiling

    Are there are any regulations/guidance on the maximum weight that a luminaire can be if it is only supported by the plasterboard ceiling and not fixed to any joists or noggins? I have a customer who would like a (heavy, but currently unweighed) light fitting from their old house fitted in the...
  18. gazdkw82

    Maximum Zs values for BS3871

    Where can I find the max Z's value for a BS3871, type 3, 32A MCB? Iv had a look through BS7671 and done some searching online but I cannot find it. IV found some tables with listed Zs values for a 3871 but I have no idea where they originate from or how old
  19. F

    Maximum number of lighting points

    Hello, Could any Irish members on here either tell me the maximum number of lighting points permissable on a circuit? I seem to remember a Fàs teacher mine saying that it was 10. The reason being that it's to do with a property being put into darkness in the event of a fault. I also think that...
  20. C

    Maximum demand question

    A client contact me as they are getting the supply upgraded to a block of flats and UKPN need a figure adjusted for diversity for each flat. The original contact didn’t give a crap about the supply capacity. x6 flats have been refurbished and during this process x6 15kw electric boilers for...

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