17th edition exam question not find answer? - Electricians Forum | Electrical Forum | An electrical forum for electricians in the UK

TONY JONES · 01-08-2008

just wondered if anyone can find this one as i couldn`t

A single phase ac installation from a lighting db contains a common conduit with 8 single core cables the grouping factor to be applied is

a 0.59

b 0.65

c 0.75

d 0.8

may be i was rushing but could not find one of these in grouping factors?

cheers

Tony

cossie400 · 01-08-2008

Is it 0.80?, table 4c1 p268 i think mate.

wayne · 01-08-2008

app 4, 2.3.3.1 how many circuits?

TONY JONES · 01-08-2008

Quote:

Originally Posted by wayne

app 4, 2.3.3.1 how many circuits?

thats how question was worded did not state number of circuits that threw me

Quote:

Originally Posted by cossie400

Is it 0.80?, table 4c1 p268 i think mate.

have not got book but dont think 0.8 applies to 8 cables?

Grae79 · 01-08-2008

i'd go for 0.65. Table 4C1 "Note 3: factors apply to - groups of 2 or 3 single core cables"
8 singles....4 groups of 2...0.65 that's my reckoning anyway

could have 2 groups of 3 and a group of 2 which would give you 3 circuits and 0.70, but that's not one of the choices.

TONY JONES · 01-08-2008

Quote:

Originally Posted by Grae79

i'd go for 0.65. Table 4C1 "Note 3: factors apply to - groups of 2 or 3 single core cables"
8 singles....4 groups of 2...0.65 that's my reckoning anyway

could have 2 groups of 3 and a group of 2 which would give you 3 circuits and 0.70, but that's not one of the choices.

cheers pal think youve hit the nail of the head

cheers

tony