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HI all back on nite shift A 2.5 kw heater is in use for 7.5 hours daily and energy cost 7.1p per unit. the total cost of running the heater over a month of 28 days is =

Thanks all need to get a new calculator been a long day

4.5 x 3.5 x 330 =2,450,12 missed the squared out , if i do it with the square in i get syntax error

I get 2,450,12

Hi all Here is one, A current of 4.5A flows in a 3.5ohms resister for 5.5 minutes. The energy dissipated is , can anyone refesh this old mind of my and show how its done thanks

Thats one I would get, is exam success,

yep steptoe Ive seen threads put on this place by Administrator,is this not what the site is about getting the old cogs working again and helping people out, and it might get some one else thinking thats how you work that out ?

I sat it in June , They have 5 papers for this year and next year they will make up another 5 and so on,I would go with KME what he is saying a lot of reading the GN3 and a lot more until you are sick of it get to know the book inside out and the main one is terminology

Thank you bhamoddy and DAN077 that was great help

Hi all a conductor has across-sectional area of 20mm2 a length of 48m and is made of material with a resistivity of 0.02uohmsm, its resistance is i get 48 can anyone remember me how to work it out thanks

Thanks m4tty on night shift and just refeshing alot of old shuff

HI all A cuurent of 26ma flows in a circuitwhen a 24V supply is connected to it its resistance is 923 or 9.23

Thank you all i have got to old for this lol

Hi all Can anyone remind me how to do this again ? calculate the current taken by a 100 wat lamp having a working resistance 0f 200ohm

Hi all Any help would be good thank , I came across a link,for a check list for a CU change, and wiring size last week ,I can't remember were it was any help would be grateful Thanks

Just done first fix for lights clipped to battens from one light to the other

Thanks sparkytim sorry only 4 wire

Hi all Got a call today about an intercom systems for a old man , ITS GDX phone he had one in the corridor ,which someone move to the sitting room and another one installed in he's bed room, Had a look at it only 4 wires o/w o, b/w, b , The problem is it does not buzz at all . But you need to...

Hi. I got a call Today from a customer ( a Friend )with a problem with the TV distribution. There is a splitter that feeds 4 rooms from the 1 aerial. In one of the rooms there is a small box which they say is a single booster (Which is ) and the coax has come adrift ( Which was put back in )from...

HI All got a call today got a splitter freeding 4 room an internal booster feeding 1 of the rooms coax came out ,and now all the rooms don't work headbang