C2 or c3

[Plonker 3]

So Zdb is fine for OCPD, what is the issue here?

 

[Pete999]

So Zdb is fine for OCPD, what is the issue here?

None just trying to help

 

[Silly Sausage]

So Zdb is fine for OCPD, what is the issue here?

Unless they're huge cables where the armour is insufficient.
Where's that table?

 

[Plonker 3]

The OP hasnt mention the armourings not being suitable though, just no fly leads from gland to earth terminal. So i imagine this has been checked and complies with the regs.

 

[Silly Sausage]

The OP hasnt mention the armourings not being suitable though, just no fly leads from gland to earth terminal. So i imagine this has been checked and complies with the regs.

He says, "No separate earths", which I'm reading as no separate CPCs.
I reckon the armour sizings haven't been checked!

 

[Plonker 3]

More than likely not. The trouble is too many sparks just see no fly leads and instanly think it doesnt comply without actually checking any futher.

 

[davesparks]

If the gland is attached to clean metal rather than painted then I see no issue.
If the glands are onto painted metal the only contact may be through the rough edges of the hole, this will give a good reading with the low current of a test.
However under fault conditions a much higher current will flow and if the metal to metal contact is not good enough then it's going to get very very hot!

 

[Engineer54]

Generally speaking you can safely say that any SWA cable up to 95mm be they 2,3, or 4 core will comply with CPC requirements, only excessive cable lengths can make a difference. However if any of these Sub DB boards are acting as EMT connections for bonding purposes then, i can almost guarantee that the steel armouring will not comply!!

Think everything else has been covered by others above!!

 

[Engineer54]

Unless they're huge cables where the armour is insufficient.
Where's that table?

Here you go, ....Again... lol!!



Remember these tables are relating to compliance for CPC, they are not to be seen as compliance for bonding purposes!!

Blue = min CSA of cables SWA to comply.

(Red) = Cable does not comply.

Table for 70[SUP]0[/SUP]C Thermoplastic PVC SWA cables.

Conductor CSA​	Minimum CSA of SWA to meet 54G​	CSA of armour 2 core​	CSA of armour 3 core​	CSA of armour 4 core​
1.5​	3.4​	15​	16​	17​
2.5​	5.7​	17​	19​	20​
4​	9.0​	21​	23​	35​
6​	13.6​	24​	36​	40​
10​	22.6​	41​	44​	49​
16​	36.1​	46​	50​	72​
25​	36.1​	60​	66​	76​
35​	36.1​	66​	74​	84​
50​	56.4​	74​	84​	122​
70​	79.0​	84​	119​	138​
95​	107.2​	122​	138​	160​
120​	135.3​	(131) ​	150​	220​
150​	169.2​	(144) ​	211​	240​
185​	208.6​	(201) ​	230​	265​
240​	270.6​	(225) ​	(260)​	299​
300​	338.3​	(250) ​	(289)​	(333)​
400​	403.9​	(279) ​	(319)​	467​

Table for 90[SUP]0[/SUP]C Thermosetting SWA cables operating at 70[SUP]0[/SUP]C.

Conductor CSA​	Minimum CSA of SWA to meet 54G​	CSA of armour 2 core​	CSA of armour 3 core​	CSA of armour 4 core​
1.5​	3.4​	16​	17​	18​
2.5​	5.7​	17​	19​	20​
4​	9.0​	19​	21​	23​
6​	13.6​	22​	23​	36​
10​	22.6​	26​	39​	43​
16​	36.1​	41​	44​	49​
25​	36.1​	42​	62​	70​
35​	36.1​	62​	70​	80​
50​	56.4​	68​	78​	90​
70​	79.0​	80​	90​	131​
95​	107.2​	113​	128​	147​
120​	135.3​	(125) ​	141​	206​
150​	169.2​	(138)​	201​	230​
185​	208.6​	(191) ​	220​	255​
240​	270.6​	(215) ​	(250)​	289​
300​	338.3​	(235) ​	(269)​	(319)​
400​	451.0​	(265) ​	(304)​	452​