Numeric core identification.

[Sintra]

Guys I would like some opinions on the use of numeric cable core identification for LV circuits. See 514.5.

Eg. If using a 5 core YY flex with all cores coloured black and marked in white with 1 - 4 plus a green/yellow cpc. Can these be connected into a DB without any addition sleeving ie. Core 1 to L1, core 2 to L2, core 3 to L3 and core 4 to neutral.

 

[i=p/u]

i would say needs sleeving,, but what do i kno, hope this helps... reason being everyone else would kno after you

 

[Doomed]

Sleeve them so that people following you know whats what.

 

[i=p/u]

but in saying that if it is numbered 123 and 4 going to neutral,,, he need to be blind so maybe you can puncture holes for brail,,, upto you ladd!!!!!!

 

[Sintra]

Let's talk strictly regs, sleeving or not? Cables to be connected into a DB along with cables with coloured identification.

 

[johnboy6083]

For me colored sleeving is needed unless indents include the phase or neutral designation. We sleeve all cores if LV and don't sleeve instrumentation. All cores identified with silver foxes.

 

[johnboy6083]

According to regs, identification is by colour or lable. I prefer colour, with additional info labelled with silver foxes ect.

 

[i=p/u]

il get me book out...

 

[Sintra]

il get me book out...

514.5.1 & 514.5.4 brb.

 

[i=p/u]

all numerals should be in strong contrast to colours of insulation 514.5.1

 

[pennywise]

Has someone done a big install and now being asked to sleeve the lot as a snag

 

[topquark]

Strictly according to the regs, then no, not required (see 514.3.1 (i) which explicitly says and/OR). The use of or implies that using either colour or one of the number/labelling schemes is the only requirement. Not sure it's good practice though.

 

[Sintra]

Has someone done a big install and now being asked to sleeve the lot as a snag

No luckily not in this case, it's just me trying to prove a point so to speak.

 

[pennywise]

Relief

 

[BigBreakfast]

I generally just make it clearly L1/L2... etc without sleeving (apart from the earth), I find this clearly shows which core is being used for which purpose.

 

[MarkieSparkie]

Guys I would like some opinions on the use of numeric cable core identification for LV circuits. See 514.5.

Eg. If using a 5 core YY flex with all cores coloured black and marked in white with 1 - 4 plus a green/yellow cpc. Can these be connected into a DB without any addition sleeving ie. Core 1 to L1, core 2 to L2, core 3 to L3 and core 4 to neutral.

Hi Sintra,
514.5.4 says "Conductors may be marked with numbers, the number 0 (zero) being reserved for the neutral or midpoint conductor."
Also the preferred list for the identification of conductors is given in Table 51

 

[Knobhead]

When ever we used YY all cores carried a drive/circuit identification ferules. Only one machine didn’t and everyone hated working on it.