Protective Devices

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New Features

Last post by gregmcc « Thu Apr 23, 2020 12:23 pm
Posted in Announcements
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by gregmcc » Thu Apr 23, 2020 11:50 am » in Announcements

Hi everybody,
Just thought it was time for an update. We have over 160 members which is very good. Thank you for your support!

A few new features...

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Last post by gregmcc
Thu Apr 23, 2020 12:23 pm

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Deleted post can't find? Is descrimination of same branch required

Last post by Dan L « Fri Sep 11, 2020 10:16 pm
Replies: 3
by Dan L » Fri Sep 11, 2020 7:17 am

I posted this recently got an answer but know I can not find?

3 Replies

156 Views

Last post by Dan L
Fri Sep 11, 2020 10:16 pm
2.6.3.4 Alterations, additions and repairs

Last post by AlecK « Tue Aug 18, 2020 12:34 pm
Replies: 5
by JamieP » Mon Aug 17, 2020 12:15 pm

Does this come into play when replacing SERFs on a board to plug in MCBs, no alteration of base

I thought about this a bit and thought no, because...

5 Replies

247 Views

Last post by AlecK
Tue Aug 18, 2020 12:34 pm
MCB's as isolators

Last post by AlecK « Sat Aug 01, 2020 10:51 am
Replies: 4
by Nathan » Fri Jul 31, 2020 8:12 pm

I was recently talking to someone at a trade show regarding having to have a isolator for a hot water cylinder under the current standards.
They had...

4 Replies

259 Views

Last post by AlecK
Sat Aug 01, 2020 10:51 am
Looking at a comment in Electrolink

Last post by AlecK « Thu Jul 30, 2020 9:56 am
Replies: 9
by DougP » Sun Jul 12, 2020 3:43 pm

May-July
Page 18, third column

Cheap 230V MCBs are often used on three phase installations but some electricians don't realise that they could end...

9 Replies

406 Views

Last post by AlecK
Thu Jul 30, 2020 9:56 am
RCD in old switchboard

Last post by AlecK « Mon Jul 13, 2020 8:55 am
Replies: 7
by ElectricalApprentice » Fri Jul 03, 2020 8:41 pm

Hi,

The boss is sending me to a job which will consist of upgrading to RCD protection in an old black panel switchboard for two power circuits....

7 Replies

335 Views

Last post by AlecK
Mon Jul 13, 2020 8:55 am
PDL breakers

Last post by AlecK « Thu Jul 09, 2020 9:59 am
Replies: 2
by JamesM » Wed Jul 08, 2020 9:23 am
Rating: 12.5%

I came across these old PDL devices that I suspect are MCBs. Can anyone provide any information on them including what range they are from, are they...

2 Replies

201 Views

Last post by AlecK
Thu Jul 09, 2020 9:59 am
Type A & Type AC RCDs

Last post by AlecK « Thu Jul 02, 2020 5:58 pm
Replies: 5
by TPower » Fri Jun 12, 2020 12:49 pm
Rating: 12.5%

If an RCD used in NZ is labelled as being Type AC, however passes a test when tested as Type A does it comply?

8.3.10.2 note 1 If the RCD being...

5 Replies

273 Views

Last post by AlecK
Thu Jul 02, 2020 5:58 pm
Do Isolation Switches require being lockable?

Last post by JamieP « Thu May 14, 2020 4:45 pm
Replies: 5
by JamieP » Wed May 13, 2020 7:36 pm

I just had my mind blown by the fact that I was always told and always believed that part of being an isolation switch was being lockable

Looking...

5 Replies

236 Views

Last post by JamieP
Thu May 14, 2020 4:45 pm
RCD protection for added lighting points

Last post by JamieP « Tue May 12, 2020 3:12 pm
Replies: 6
by JamieP » Sun May 10, 2020 2:23 pm
Rating: 12.5%

So most people seem to say that if you add a lighting point it doesn't require RCD protection

2.6.3.4 Exception 2 Extensions to final subcircuits...

6 Replies

310 Views

Last post by JamieP
Tue May 12, 2020 3:12 pm
HRC to MCB discrimination

Last post by pluto « Wed Apr 29, 2020 9:04 am
Replies: 1
by JamieP » Fri Apr 24, 2020 7:10 pm
Rating: 12.5%

Anyone have much knowledge or experience with doing discrimination studies?

I want to check the discrimination between an 63A gG HRC with downstream...

1 Replies

171 Views

Last post by pluto
Wed Apr 29, 2020 9:04 am
2.5.7.2.3 Discrimination examples (b) and (c)

Last post by JamieP « Tue Apr 21, 2020 8:20 pm
Replies: 5
by JamieP » Sun Apr 19, 2020 3:47 pm

Discrimination on overload and instantaneous operation may be
deemed to be provided when C1 ≥ 2 × C2, e.g. C1 curve 63 A
with C2 curve 32 A (see...

5 Replies

265 Views

Last post by JamieP
Tue Apr 21, 2020 8:20 pm
Type S RCD Main Switch

Last post by AlecK « Tue Apr 21, 2020 11:17 am
Replies: 10
by JamieP » Sat Apr 18, 2020 11:44 pm
Rating: 25%

2.6.2.3 Protection against initiation of fire
Although not a mandatory requirement of this Standard, to provide
additional protection against the...

10 Replies

397 Views

Last post by AlecK
Tue Apr 21, 2020 11:17 am
Imported: MCB discrimination

Last post by DougP « Thu Apr 16, 2020 8:38 am

by DougP » Thu Apr 16, 2020 8:38 am

broadsword
Sep 07 2019 14:11

Can anyone steer me to somewhere other than 3000: 2.5.7.2.3 (a) (iii) with respect to selection of MCBs to provide...

0 Replies

96 Views

Last post by DougP
Thu Apr 16, 2020 8:38 am
Imported: D type MCB Earth fault loop

Last post by DougP « Thu Apr 16, 2020 8:34 am

by DougP » Thu Apr 16, 2020 8:34 am

Blownfuse
Oct 15 2019 16:44

I have a 3 phase D type 40A MCB for a submain protection therefore it can have the 5 second rating applied, where...

0 Replies

81 Views

Last post by DougP
Thu Apr 16, 2020 8:34 am
Imported: Type B RCD

Last post by DougP « Thu Apr 16, 2020 8:24 am

by DougP » Thu Apr 16, 2020 8:24 am

north1
Oct 08 2019 20:50

Can any one advise where I can purchase a RCD Type B 20 amp RCD.
Will be used for protection of single phase EV...

0 Replies

84 Views

Last post by DougP
Thu Apr 16, 2020 8:24 am
Imported: RCD doesn't switch neutral

Last post by DougP « Thu Apr 16, 2020 8:24 am

by DougP » Thu Apr 16, 2020 8:24 am

mowgli
Aug 21 2019 16:00

Is it true that an RCD that isn't required by the Standard, isn't required to switch the neutral? I've always assumed...

0 Replies

107 Views

Last post by DougP
Thu Apr 16, 2020 8:24 am
Main switches at residential property

Last post by DougP « Tue Apr 14, 2020 5:42 pm
Replies: 2
by tumeke » Tue Apr 14, 2020 12:59 pm

Hi Guys - just a question about main switches and overcurrent protection of mains at a residential property. I have asked some of the guys I work...

2 Replies

176 Views

Last post by DougP
Tue Apr 14, 2020 5:42 pm
Imported: Requirment for RCDS commercialy when adding socket

Last post by DougP « Tue Apr 14, 2020 8:13 am

by DougP » Tue Apr 14, 2020 8:13 am

adds133
Oct 11 2018 21:06

So under 2.6.3 there is no mention of needing RCDs out of residential installations apart from medical and schools etc....

0 Replies

113 Views

Last post by DougP
Tue Apr 14, 2020 8:13 am
Imported: Maximum demand in final subcircuits

Last post by DougP « Tue Apr 14, 2020 7:57 am

by DougP » Tue Apr 14, 2020 7:57 am

DougP
Sep 25 2018 13:17

I know this has been discussed many times..

But why does C2.5 seem to say that there is only 2 methods for determining the...

0 Replies

217 Views

Last post by DougP
Tue Apr 14, 2020 7:57 am

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