SANS 10142-1 ED3.2

[GCE]

Hi
New edition of SANS 10142-1 was published and made available today

Quite a few grammar errors and technical references to documents updated/corrected with to me a problem area with the deletion of Annex M
Was not aware that Annex M was being deleted ,but the chatter that has been happening now makes sense - My feeling is the people we ask to represent contractors interests have been sleeping
A note was added to 7.12.7

Table of Changes Amdt 2

Amended to update referenced standards and
the requirements for voltage drop, busbars
and earthing, to replace reference to an
association with a reference standard, to
delete the clause on external lightning
protection, and the annex on authority for
issuing a test report and a Certificate of
Compliance.

7.12.7 Additional requirements for photovoltaic (PV) and similar
installations that provide a supply as an alternative to the main supply
NOTE For the installation and certification of the dc part of solar or part of an PV for
single phase installation, refer to the relevant national legislation (see foreword).
Amdt 2


Foreword
Reference is made in the note to 7.12.7 and note 2 to clause 8 to the "relevant
national regulation". In South Africa this means regulation 5(6) of the Electrical
Installation Regulations, 2009, of the Occupational Health and Safety Act,
1993 (Act No. 85 of 1993). Amdt 1; amdt 2

[GCE]

Good to see an improvement with " water heaters " - To me was a problem area where undercounter geysers for basins in small office kitchens where being fed with a socket outlet.
The red type has been added into the clause

[I]6.16.2.2 Dedicated circuits shall be provided for water heaters and there may
be more than one water heater on each circuit. Where a socket-outlet is used,
it shall be unswitched[/I]

[GCE]

I do not see the changes in the test report as indicated by the foreword - Maybe someone see's what I am missing

Foreword
The test report in edition 3 may be used in parallel with the test report in
edition 3.2 for a period of 12 months from the date of publication of edition 3.2.

[Derlyn]

Is a kettle a water heater ?

[GCE]

Is a kettle a water heater ?

A kettle would be a portable appliance as it is not fixed or plumbed

instantaneous water heater would be a "hydro boil " type set up or the shower heads you like .


6.16.2 Water heaters
NOTE Water heaters include geysers, instantaneous water heaters including units for
boiling water, heat pumps, solar systems, induction water heaters and the like (see also
6.16.1). electrode water heaters, steam generators and boilers are not included (refer
to 6.16.7)

[GCE]

The one thing that got me thinking and has not been improved is that the socket outlet for a small under counter geyser would need to be on it's own circuit , which is really bizarre on a element that is less than a KW

People still conveniently confuse the terminology of dedicated circuit to mean without ELU when it is actually referring to a circuit for water heater only
ELU will need to be fitted for hot water heater

6.16.2.2 Dedicated circuits shall be provided for water heaters and there may
be more than one water heater on each circuit. Where a socket-outlet is used,
it shall be unswitched

6.16.2.1 All water heaters shall be bonded in accordance with 6.13 and a.c.
supply circuits shall be protected by earth leakage protection with IΔn not
exceeding 30 mA.

[Dave A]

So a Speed heat shower head needs to be supplied by a circuit dedicated to water heaters?

[Derlyn]

Thank you, my brother, yes you are correct about me liking the showerheads. Most of my clients who have had them fitted, have thanked me when they see the difference in their electricity bill.
The difference between a geyser and showerhead is quite noticeable.

I'm wondering what the thinking was for the socket outlet not to be switchable ? Other than welding type socket outlets, I don't think I've seen "normal" socket outlets that are used in domestic applications, that are unswitched. Maybe the thinking was that one shouldn't use a "standard" socket outlet in a dedicated water heating circuit.

Your thoughts ?

[Derlyn]

@Dave. That's how I've always installed them, on their own circuit. Most of them, in any case, are rated at more than 16A, but for those that are not will now also have to be on their own circuit.

A good thing, I'd say.

[GCE]

So a Speed heat shower head needs to be supplied by a circuit dedicated to water heaters?

That is how I am reading it - Does not seem to be wriggle room - You can have more than 1 on the circuit which helps with heat pumps where you then stick a 1 kw element in the geyser for back up

6.16.2.2 Dedicated circuits shall be provided for water heaters and there may
be more than one water heater on each circuit. Where a socket-outlet is used,
it shall be unswitched

[GCE]

I'm wondering what the thinking was for the socket outlet not to be switchable ? Other than welding type socket outlets, I don't think I've seen "normal" socket outlets that are used in domestic applications, that are unswitched. Maybe the thinking was that one shouldn't use a "standard" socket outlet in a dedicated water heating circuit.

Your thoughts ?

Have no idea why they would make that statement of unswitched - you get the module type sockets that are unswitched .
Maybe it is to stop other appliances being plugged in if you say put it in for an undercounter geyser and a wash machine is close by.

[Dave A]

I'm wondering what the thinking was for the socket outlet not to be switchable ? Other than welding type socket outlets, I don't think I've seen "normal" socket outlets that are used in domestic applications, that are unswitched. Maybe the thinking was that one shouldn't use a "standard" socket outlet in a dedicated water heating circuit.

Your thoughts ?

I suggest so that you can't have the power off without also disconnecting the neutral. I expect the concern is people might (quite probably would) switch off at the switch and start working on the element or thermostat, but the neutral was still connected. Rather force the user to unplug first.

Makes you think a bit about the classification of socket outlets as an isolating device in general application

[Derlyn]

We are discussing water heaters but what does the ommission of Annex M mean ?

May any registered person now issue a coc and test report for any installation irrespective of whether they are single phase tester, IE or MIE ?

[GCE]

We are discussing water heaters but what does the ommission of Annex M mean ?

May any registered person now issue a coc and test report for any installation irrespective of whether they are single phase tester, IE or MIE ?

No - not quite - What it does mean is that the OHSA definitions now stand for single phase tester which means any installation with a point of control that is single phase may be worked on by a Single phase tester no matter what is after the point of control eg , solar unless it is a " specialised electrical installation " eg hospital , petrol etc

It is a joke - We have gone from an SPT only allowed to do lights and plugs in a dwelling smaller than 100sqm ( i think 100sqm was the cut off ) and no stove , geyser or low voltage lighting to full blown domestic electrician with absolutely no training on the regulations with regards to DC , loading etc


Extract from OHSA EIR
"[I]electrical tester for single phase" means a person who has been registered as an electrical tester for single phase in terms of regulation 11 (2) for the verification and certification of the construction, testing and inspection of electrical installations supplied by a single-phase electricity supply at the point of control, excluding specialised electrical installations;[/I]

[GCE]

I suggest so that you can't have the power off without also disconnecting the neutral. I expect the concern is people might (quite probably would) switch off at the switch and start working on the element or thermostat, but the neutral was still connected. Rather force the user to unplug first.

Makes you think a bit about the classification of socket outlets as an isolating device in general application

That could make sense and as you say , open another can of worms