Ze on a SWA

[nicsin02]

Hi guys, i am testing a 3-phase D/B tomorrow and its supply is only a 4-core cable so its earth comes from the Gland-frying pand and then a flying lead to the earth bar, normally doing domestic property i would disconnect earth for Ze ensuring no parralell paths, what would be the norm on this occasion? thanks guys

 

[telectrix]

same procedure but measure o each of the phases. reconnect earthing conductor for PFC reading. ensure installation is isolated before dissing earth. if it's a sub-board, the EFLI is noted as Zdb

 

[nicsin02]

so do i have to take the lock-nut off and disconnect the gland to make sure no paralell paths?

 

[telectrix]

is the SWA glanded into a metal CU or an insulated one?

 

[nicsin02]

is the SWA glanded into a metal CU or an insulated one?

metal mate

 

[DurhamSparky]

do not remove the GLAND!!!!

 

[DurhamSparky]

just remove any bonding cables.... and clip on to rail.... f its a PIR put it down as a limitation...!

if you take gland off and damage it putting it back on or damage teh strands it will be hell to fix..!

 

[telectrix]

in that case, i would disconnect any bonding conductors and the fly lead. i might get shot down , but i would prefer that to the possible risk of compromising the integrity of the glanding by disconnecting . apart from the risk of having 3 live phases flopping about unglanded.

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beaten to it by torpedo fingers. GRRRR>

 

[DurhamSparky]

about time i beat you at some thing!!

 

[telectrix]

must be getting old. bloody heart attack slowed me down. making a good recovery now i'm back on a few beers, though.

 

[DurhamSparky]

heart attack...!!???

Urban Dictionary: finger torpedo

i Google torpedo fingers and got this... lol not what i was looking for!

 

[needasparks]

If this is a swa feed would this mean it is a sub-board or a feed from a switched fuse as in both cases its not a Ze but a Zdb (Zs).
Its not normal to have a swa feed in the usual sense of a supply without it going through another device.

 

[telectrix]

heart attack...!!???

Urban Dictionary: finger torpedo

i Google torpedo fingers and got this... lol not what i was looking for!

see what the navy lark does for you.. no bloody hope. LOL.:dupe:

 

[nicsin02]

yeah its a sub mains fed from another board, i know its a Zdb but would still have to fill it in the Ze section for the new sub board or am i wrong lol?

 

[needasparks]

yeah its a sub mains fed from another board, i know its a Zdb but would still have to fill it in the Ze section for the new sub board or am i wrong lol?

No you are correct but this is downstream from the mains so no need to remove any earthing just isolate before testing.