any guidance on this

[Charles Lill]

any help would be appreciated

 

[Charles Lill]

watts where stated	60w x 3
Ib design current	1.30
In device rating and type	B6 MCB BS 60898
Reference method	METHOD B
Ambient temp in ◦c	40◦c
Cable type/ insulation	90◦c Thermo setting Single core non sheathed cables
Ca ambient factor	0.91
Cg grouping factor	0.80
Length in meters	12.5 METERS
Max volt drop	6.9
mV/A/m max	31
Size selected mm2	1.5MM²
It	3.41
Iz(must be larger than In)	0.61
Actual voltage drop	0.27V
Max disc time	0.4
ACTUAL Zs	0.18
Max Zs as bs7671	0.35

 

[SparkyChick]

@Charles Lill , I've moved this post into your existing thread. Please don't post questions that are all related to the same thing in different threads.


Regards

SC

 

[JAWS]

watts where stated	60w x 3 180w
Ib design current	1.30 0.78A
In device rating and type	B6 MCB B6 RCBO 61009 BS 60898
Reference method	METHOD Method B B
Ambient temp in ◦c	40◦c 40c
Cable type/ insulation	90◦c Thermo 90c T/S single core setting Single core non sheathed cables
Ca ambient factor	0.91 0.91
Cg grouping factor	0.80 0.80
Length in meters	12.5 METERS 12.5
Max volt drop	6.9 6.9
mV/A/m max	31 31
Size selected mm2	1.5MM² 1.5mm2
It	3.41 8.24
Iz(must be larger than In)	0.61 23A
Actual voltage drop	0.27V 0.3v
Max disc time	0.4 0.4s
ACTUAL Zs	0.18 0.497 round it off to 5 ( using a Ze of 0.11 )
Max Zs as bs7671	0.35 7.28 x 0.8 = 5.82

Done it red for you