I quoted a job yesterday and thought it would be a good real life question on here to discuss and debate. Heres the info. (Marvo dont answer it please, let the trainees have a go first 
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The building was a sports center but now the use of the building has changed to a place of worship. It has 2 changing rooms with shower cubicals, the customer wants 9.5Kw showers, 2 in the male changing room and 3 in the females changing room. The closest sub main board (C/U) is a cable run of 35 meters away and no spare ways available. Although that is not a problem, I will be picking up a supply from this point because the main incoming SWA feeding the board is big enough to handle the increased load of the showers and to feed the board (C/U) that consists mainly of lighting circuits and a couple of 16A socket radials.
My question is this:- How would you go about designing this project? Here are a few pointers to get you thinking....
5 x 9.5Kw showers at full load capacity = 41.3A each x 5 = 206.5A total.
Think about local isolation (35m away from the supply) How what would you design?
Size of cable rather for a sub main from the sub board or 5 x 10mm t+e? (installation method is:- on cable tray or in free air and does not need mechanical protection btw).
What is the volt drop on such a run?
A pull cord IP rated will be fitted near each shower fitting for on/off function and local isolation btw.
The rest of it is just putting a few water pipes together, I'm an electrician so that will be a walk in the park for people like us. Lets face it if a plumber can do it so can you lol. Done it loads of times as well by the way.
Over to you lot, post up what you think and how you would design this/these circuits. You wil all have to do things like this in time to come so get some practice in on here.
)The building was a sports center but now the use of the building has changed to a place of worship. It has 2 changing rooms with shower cubicals, the customer wants 9.5Kw showers, 2 in the male changing room and 3 in the females changing room. The closest sub main board (C/U) is a cable run of 35 meters away and no spare ways available. Although that is not a problem, I will be picking up a supply from this point because the main incoming SWA feeding the board is big enough to handle the increased load of the showers and to feed the board (C/U) that consists mainly of lighting circuits and a couple of 16A socket radials.
My question is this:- How would you go about designing this project? Here are a few pointers to get you thinking....
5 x 9.5Kw showers at full load capacity = 41.3A each x 5 = 206.5A total.
Think about local isolation (35m away from the supply) How what would you design?
Size of cable rather for a sub main from the sub board or 5 x 10mm t+e? (installation method is:- on cable tray or in free air and does not need mechanical protection btw).
What is the volt drop on such a run?
A pull cord IP rated will be fitted near each shower fitting for on/off function and local isolation btw.
The rest of it is just putting a few water pipes together, I'm an electrician so that will be a walk in the park for people like us. Lets face it if a plumber can do it so can you lol. Done it loads of times as well by the way
. Over to you lot, post up what you think and how you would design this/these circuits. You wil all have to do things like this in time to come so get some practice in on here.
All in in jest though.
BOOM !!!
