electricalforum.nz

AlecK

protective earthing [5.2.1] is not required. the bench is not any of the things that is required to be earthed for fault protection by automatic disconnection of supply [5.4] It's not exposed conductive parts of electrical equipment [5.4.1.1], nor conductive building materials [5.4.1.2] . Even if it...

AlecK

If it isn't clearly marked with both duty and Standard; I wouldn't use it underground.
Or at least, not for LV installation wiring where the category depends on the duct / conduit.

AlecK

I have both types. Also an older hand-cranked analogue, now only for workshop use. "Horses for courses." If I want to record test values - which isn't often, 'cos it slows you down - I might use the digital; because it's easier to read the digits than to read off a scale. But I prefer my analogue IR...

AlecK

There's a lot of stuff available for sale that is inherently not fit for use and bordering on electrically unsafe. Like other connector Standards, '3112" specifies the details for plugs , sockets, connectors, etc so that they all match. In fact cord connectors for our three-pin, flat-pin LV are spec...

AlecK

Pluto's very detailed history is - mostly - correct. Not that it changes anything, as we'd already reached the conclusions that a) the set-up was non-compliant and couldn't be issued a WoEF ; and b) it may well have complied when installed, under ECP 1. Pluto disagrees with conclusion b), and states...

AlecK

I think what you're missing is that this bonding is not related to hazards arising from the electrical equipment. It's about hazards arising from the pool water being at significantly different earth potential than the installation's earthing system. In crude terms, and for an extreme case, the pool...

AlecK

It should have the Standard it's made to comply with printed on it. 2053 series for plastic conduits. I suspect ducts is the same standard, with "duct" being used more as general size indicator Agree for Cat A needs to be HD, or MD encased in concrete (assuming plastic duct and insulated / sheathed ...

AlecK

Exactly. 3.12.4 is about distance between supports. Yes there's a difference between the max distance between supports for annealed Cu (20 m) and hard drawn (40 m for 2 conductors 6 mm2, 60 m for 16 mm2 and greater) . Which shows that yes longer spans of copper need to be HD. And also shows that the...

AlecK

True the PECs we install primarily for purposes of fault protection can also serve an equipotential bonding function. So yes, if the pool equipment is Class I and so has a PEC; then the PEC can also act as a EBC (and because incorporated into the cable instead of being a separate conductor, doesn't ...

AlecK

One option would be to restore the unit to compliance with original rules; ie ECP1. However that's only short-term solution; as eventually the WoEF system will change so that N-E links have to be removed and RCd + current limitation has to be fitted before a WoEF can be issued. (being written into n...

AlecK

Exactly.

However it's possible this unit is old enough to have originally had a N-E link that has since been (illegally) removed.
Under ECP 1 allowed the link to be at the first fitting if there was no switchboard;
and that arrangement was not uncommon ('cos it was cheaper)

AlecK

Table 3.9 does NOT specify that hard drawn must be used.
The table specifies the maximum spans for various types of cable; and the longest span - 60 m - can apply to several types; not all of which are hard drawn.

AlecK

If it has been built to NZ requirements; then that's ESR 60(1)((e) which requires full compliance with "3000" as modified by "3001" (and that's what a CoC would be certifying). Which - as you've noted - means that sockets generally need a control switch - not necessarily integral - to comply with 4....

AlecK

CoCs are for work done under NZ law; which is generally work done in NZ. A CoC doesn't have to be issued for an imported connectable installation that was wired overseas; though there's nothing to prohibit one from being issued. In many places the wiring of caravans etc is not done as electrical wor...

AlecK

Rather than risk chasing down off-topic rabbit-holes; I'll avoid the (non) issue of "conductors" vs "cables" for now; other than simply observing that "cable" is a defined term [1.4.17], and that every cable has at least one conductor. There are several options for the original situation [Residentia...

AlecK

3.13.3 says anything on catenary (outdoors) uses the clearances for N/S.
There's no height for TPS as aerial conductors; 'cos you just don't do it.

AlecK

Refer definitions 1.4.101 vs 1.4.102; also clause 4.3 for demarcations between. These make it very clear for discrete items of equipment; but rather less clear for what might be called 'distributed equipment'. Example 1: split system heat pump. The supply to it, through the isolating switch req'd by...

AlecK

Tails from o/h supply to mains entry box are not required to be double insulated; exactly the same rules apply to the tails as for the incoming aerial span. However the insulation material may well be different; therefore requiring different treatment. These days aerials are generally N/S rather tha...

AlecK

The colour codes specified in "3000" [3.8.1 / Table 3.4] apply only to "installation wiring". That includes the "absolute" ban [3.8.1 & 1.7.2] on green, yellow, or green-yellow for active or neutral. In most cases signal cables are not "installation wiring" . Where it is 'installation wiring", and c...

AlecK

if the MIs just state a load current, then we can still apply diversity to FLC. But if MIs specify a cable size or circuit rating, then that would be the minimum; and the 2018 edition will require us to comply. Which can be a problem if the MIs are written for US market; where V is 110 & A for any g...

AlecK

TPS on catenary doesn't need conduit.

(use 3.13 catenary instead of 3.12 aerial)

AlecK

Yes (technically); for an un-earthed d.c. system Though note that in 2.3.2.1.1; which sets requirements for a.c & d.s systems; the words 'active" & "neutral" are used only for a.c. I suspect this is just the background bias towards LV a.c. that exists throughout "3000" I'll have to check what the IE...

AlecK

Yes, they got it wrong. Again. Detailed explanation can wait; but suffice to say that their classification of it as maintenance is fundamentally flawed, ; and appears to have been made principally so that they could apply disciplinary provisions (which can only apply to people doing PEW). If it's no...

AlecK

The exception to 2.9.1 provides guidance. Also note the2.9.2.3 requirement for MSB to be "within easy access of an entrance". Also 2.9.2.4 requirements for door to MSB to be clearly marked; and for location of MSB to be indicated conspicuously at each entrance. It comes down to balancing the safety ...

AlecK

This Clause only relates to location (of the control & protection items covered by clause 3.3); and the "treated as MSB" part (added in A1, Jun 2012) is clearly stated to be limited to "for the purposes of access". Other requirements for MSBs, or other swbds, do not apply - or rather, not via this c...

AlecK

no, you're NOT allowed to cut those seals. And if you did; you'd be liable for the cost of having the metering re-certified. Which means you can't re-liven,Trustpower will have to do it which is why they need to "sight" the certificate (as per ESR 74) Similar if the isolation is by removal of servic...

AlecK

1 megohm on 230V gives 0.23 mA . The 10k ohm allowed for eg MIMS elements gives 23 mA - usually but not always enough to trip a 30 mA RCD Conversely; 30 mA (RCD must trip) comes at 7667 ohms. so just how low was the reading? slightly above 0 ohm (as stated) should certainly result in RCD tripping Sl...

AlecK

Publication / Gazette date is seldom the effective date. As a living document, ESRs are a composite, with changes made at infrequent intervals. Most significant chages are made by issuing "Amendment Regs, and these will include a date, or dates, that the amendments come into force.. EG the Electrici...

AlecK

Agree with DougP that the tails may possibly be undersized. Not enough info given to be sure; as CCC depends not only on conductor material; but also insulation type, and installation conditions (for worst part of the run). however as long as they do have CCC adequate for load to be carried, and are...

AlecK

Not the same thing. A CoV is a hangover from 1993 Regs. There's no official, or example, RoA (yet) except in latest (2019 + A1) edition of "3012" Similar forms coming in current revisions of 3001 & 3004; the only differences being the Standard(s) referred to. But the basic requirements for an RoA ar...

AlecK

I suspect this requirement is mostly ignored. But yes, i believe that a visual check plus continuity test confirms that a MES exists. Nothing says it has to be off any particular standard or efficacy. Would have to think about alternative tests that might be deemed adequate if electrode not readily ...

AlecK

Looks nasty; whatever it's meant to be doing. The question of whether the "floating dock" is a boat or not doesn't really matter; as the fact that it's directly connected to an installation means it comes under the rules for that installation. It's acceptable to directly connect a boat, but doing so...

AlecK

In general we're only responsible for what we do, and not for what was already there (except that we mustn't make existing stuff any less safe than it was). Accordingly I believe the correct interpretation is that these pre-connection checks apply in terms of the supply to the "part installation" ab...

AlecK

"MEN" is a term used to describe the particular variant of the TN-C-S earthing system that is generally used for distribution in Oz & NZ. That is, the distribution system is TN-C; with the "multiple" points of tying the distribution N to earth being 1 at the transformer and one in each installation ...

AlecK

For Regs, there's always a "commencement date", generally Reg 1 is "Title" & Reg 2 is "Commencement" . For ESRs 2010; it was given simply as 1 April 2010, so that one is easy. They don't change that Reg when amendments happen; but each amendment is published as a separate "Electricity (Safety) Amend...

AlecK

The requirement for o/l protection may be spelt out in Orion's (and some other) network connection contracts; but it's always our responsibility because mains are part o9f the installation; and all conductors in the installation must have o/l protection, short circuit protection, & fault protection....

AlecK

Pluto's list includes an entry for "Electrical Regulations 2007 + AS/NZS 3000". No such Regulations were ever promulgated. The1993 Regs were issued under a significantly revised Electricity Act; so many of the changes related to aligning with that. The principal changes for Electricians related to t...

AlecK

Correct that SDoC is a control on what's for sale/supply, and has SFA to do with what gets installed / connected. Regardless of source. & regardless of SDoC / Approval; responsibility for everything that gets connected rests on the person who connects it. If connected by an electrician, there has to...

AlecK

The importer is whoever arranges for import; which in this case is the homeowner. I believe that no offence would be committed by anyone if such fittings were installed, either by homeowner or by an electrician. However it's likely an offence would be committed if the house was later sold while incl...

AlecK

No; it doesn't mean that at all. The max acceptable disconnection times are set differently due to different levels of risk; as in there's much less risk of shock from fixed equipment than from portable equipment. This relates to providing "fault protection"; ie protection against shock from contact...

AlecK

So I'm not the only sad bugger who just had to check the forum today

AlecK

ESR 113 doesn't apply when fittings are replaced. It's about items remaining in service ("may continue to be .... used"); and when you replace something it's not continuing to be used. You stop using the old and start using the new. The regulation that applies for replacement is ESR 59(3); which all...

AlecK

It's certainly not "maintaining" or "repairing"; as it changes the configuration of the way the installation's earthing is connected. It affects the MEC, so it's "mains work"; and as non-maintenance mains work ESR 6A classifies it as high risk PEW. As with any classification system, there are always...

AlecK

So the driveway has been concreted. That's NO reason not to inspect. In fact it is reason to be suspicious that the cable-laying isn't right. There's only two possible reasons why they didn't ask for inspection until this late. Either they're trying to hide something; or they are - as you suggest - ...

AlecK

Short answer: No; because Schedule 2 of ESRs changes Clause 4.18

AlecK

Yes, an electrode is electrical equipment. It's not equipment that would be classed as a source of ignition; but while that wording is used in Clause 4.18; that';s not the rule we have to apply. Schedule 2 of ESRs changes this clause (and several others); so that only electrical equipment that is di...

AlecK

You are correct ; but only WRT the CoC, there's nothing about relying on the RoI.
and they also have to sight signed test results

(Sorry; I should have checked; never rely on memory)

AlecK

An interesting example; and I understand that yes, this sort of thing has been going on in the "deep south" for years. Until recently, with knowledge and support of the network; though that may now be changing. Certainly Powernet has tightened up on who can access the network assets under their cont...

AlecK

My understanding is that all industry orgs have repeatedly sought & supported the updating of citations. 3years ago MasterElectricians put a lot of effort into providing a nationwide roadshow covering changes in 2018 edition of "3000"; in expectation that the ESRs amendment would happen as previousl...

AlecK

The Guidelines are just that: guidelines. They are not legally enforceable. 2018 edition of "3000" has clause 7.9 to set requirements for EV charging; but since this edition has yet to be cited these 'requirements" are not legally enforceable either. Unless / until ESR 6A is changed, no EV charging ...

Search found 914 matches