Dont you just love RCDs !!

[sythai]

I'm after a crabtree starbreaker D6 MCB.... any ideas please ? Tried a few wholesalers that I use with no joy

Cheers Sy

Not sure whats going on with the title of my post - "Dont you just love RCDs!!" (was a previous posts title) Should read "Crabtree Starbreaker MCB"

 

[mogga]

have you tried Google or Fuse company I think they are in liverpool Buy Fuses Online from The Fuse Company

 

[sythai]

Thanks Mogga no joy there just B or C... starting to have my doubts wether they actually made a 'D' Type ?

 

[i=p/u]

theres a place in ballamena , n.ireland called flouresnt plus who gather up all old breakers, you could try them ive only used them once and it was a fiver which earned me a 100 Fluorescents Plus

 

[MarkieSparkie]

I'm after a crabtree starbreaker D6 MCB.... any ideas please ? Tried a few wholesalers that I use with no joy

Cheers Sy

Not sure whats going on with the title of my post - "Dont you just love RCDs!!" (was a previous posts title) Should read "Crabtree Starbreaker MCB"

Crabtree don't do a Type D MCB for their domestic Starbreaker or Loadstar boards. Only Types B and C available.

 

[sythai]

Crabtree don't do a Type D MCB for their domestic Starbreaker or Loadstar boards. Only Types B and C available.

Yeah Just seen that on there website, great...... right plan B

This is going to work out to be an expensive light fitting for my customer.

Basically he's brought some fancy fitting with a transformer in it, which keeps tripping the MCB - he's read the fitting instructions further and it states requires a type 'D' mcb. Thats a new one for me.

So now looks like I'm going to have to split tails a separate mini cu just to do re-do the lights on a 'D' :dizzy2:

But haven't seen many 'D' types for domestic CU's ???

Any thoughts ?

 

[mogga]

why are you after a "D" type anyways?

 

[sythai]

Found one I think....good old Hager :wink_smile:

 

[tony mc]

Got me thinking now as the Starbreakers are the plug in type !!

 

[GLENNSPARK]

just out of interest as well......whats the length of run from the origin of supply to the last point on this circuit?....

 

[sythai]

just out of interest as well......whats the length of run from the origin of supply to the last point on this circuit?....

Ummm off the top of head... guess-timate would be 30-50 meters (large 5 bed house / down stairs lighting circuit)

Whys that then, what you thinking ?

 

[sythai]

Got me thinking now as the Starbreakers are the plug in type !!

Great isnt it.... any other board and I'd be ok - that's why I don't use starbreakers, no versatility what so ever

 

[telectrix]

max. Zs on a type D is about 1.5 ohms.. iv'e got a couple of starbreakers, think thy're type B though. why do you want a type D for lighting?

 

[GLENNSPARK]

Ummm off the top of head... guess-timate would be 30-50 meters (large 5 bed house / down stairs lighting circuit)

Whys that then, what you thinking ?

watch yer Zs....

 

[sythai]

watch yer Zs....

Yeah 1.50 is quite a bit lower, didnt think of that !

why do you want a type D for lighting?

......read the fitting instructions further and it states requires a type 'D' mcb

 

[spark 68]

Glenn,
Why would he have to watch his Zs ?, surely this circuit would still have to have 30mA RCD protection if he is making changes to the OCPD ?

BTW Iam aware of the lower Zs required for D type MCB's.

Just asking

 

[GLENNSPARK]

Glenn,
Why would he have to watch his Zs ?, surely this circuit would still have to have 30mA RCD protection if he is making changes to the OCPD ?

BTW Iam aware of the lower Zs required for D type MCB's.

Just asking

well do you think it prudent to rely on an RCD alone?....like a TT system?.....thats whats being advocated here.....

 

[spark 68]

well do you think it prudent to rely on an RCD alone?....like a TT system?.....thats whats being advocated here.....

Not at all,

he is going to be no where near the much criticised magic 200 ohm (1667 ohm) number though is he ?

 

[GLENNSPARK]

Not at all,

he is going to be no where near the much criticised magic 200 ohm number though is he ?

the thing here as well is short circuit...i just dont like the idea of relying on additional protection alone on the basis of using a d type when a c type would probably hold........

 

[spark 68]

the thing here as well is short circuit...

A 6A B type or D type is still 6A regardless, only the max Zs has changed for the disconnection time, if it complied for a B-type before then it still complies now in this respect (Short circuit).

if his Zs is say 2 ohms (for instance) then his 30mA RCD will mitigate this, not rely soley on RCD protection.

 

[sythai]

Checked Zs today well under (and will be on an RCD anyway.)

This has turned out to be a very expensive light fitting, did try and suggest we try 'C' type first but customer is set on going straight for 'D' type as per fitting instructions:

Cost of light fitting (prob around £200 'ish? does look rather nice)

+

Split tails (right pain in the butt as incomer is about 6m away and they come into the existing CU from behind) / mini cu / move lighting circuit across / test = £250+vat

Oh well not moaning another job for the list :rolleyes2: