General > General Technical Chat

Is this Wiring Legal? (NSW)

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EEVblog:

--- Quote from: Labrat101 on December 06, 2020, 11:19:16 pm ---So until Dave confirms what he actual Has a photo of the outside unit . There could be a possibility  That the cowboy may have made a bigger Bull's up than  shown .
 I going by the serial numbers for my reference . from the photos supplied.

--- End quote ---

I posted a photo of the outdoor unit plate, what else is there to show?

EEVblog:

--- Quote from: Monkeh on December 06, 2020, 09:24:22 pm ---
--- Quote from: coppercone2 on December 06, 2020, 09:18:47 pm ---I don't know why people are looking at regulation rather then the fact its not practical. They should make it practical for a home owner in case of contingencies.

--- End quote ---
I looked at both. Not to mention the quality of the work.
The practicality is in fact a regulation (see my post on that..), but Dave wanted actual regulations to throw at them as opposed to an untrained customer saying "that's not how I think it should be".

--- End quote ---

I've complained about the practica aspect to them as well, but wanted to know if hard wiring a device like an aircon to an existng power point circuit was even legal.

Vovk_Z:

--- Quote from: Monkeh on December 06, 2020, 09:52:21 pm ---
--- Quote from: Someone on December 06, 2020, 09:43:21 pm ---
--- Quote from: Monkeh on December 06, 2020, 09:24:22 pm ---
--- Quote from: coppercone2 on December 06, 2020, 09:18:47 pm ---I don't know why people are looking at regulation rather then the fact its not practical. They should make it practical for a home owner in case of contingencies.
--- End quote ---
I looked at both. Not to mention the quality of the work.

The practicality is in fact a regulation (see my post on that..), but Dave wanted actual regulations to throw at them as opposed to an untrained customer saying "that's not how I think it should be".

--- End quote ---
You didn't look carefully. Your partial quote of the standards is misleading/deceptive, a power point is an acceptable isolation method both practically and by the standards.

--- End quote ---

I have read quite carefully, I suggest you have another go:


--- Quote ---4.19 AIRCONDITIONING AND HEAT PUMP SYSTEMS
Airconditioning and heat pump systems incorporating a compressor shall be
provided with an isolating switch (lockable) in accordance with
Clause 2.3.2.2, installed adjacent to but not on the unit, which isolates all
parts of the system, including ancillary equipment, such as head units, from
the same location.
For split system airconditioning units, where the manufacturer requires the
airconditioning system to be connected to the electricity supply by means of
a plug and socket at the internal unit, the isolating switch installed at the
external unit shall control the socket-outlet located at the internal unit.
For airconditioning systems (including room heaters incorporating a
compressor) where the internal unit (or units) are supplied from a circuit
separate to that of the compressor, a warning sign shall be permanently
fixed on or adjacent to the compressor isolator indicating that the isolator
does not isolate the ancillary equipment. Where the internal unit (or units)
are not connected by plug and socket, an independent isolating switch
(lockable) in accordance with Clause 2.3.2.2 shall also be installed adjacent
to each separately supplied internal unit (or units).

Exceptions:
1 The isolating switch may be installed at the switchboard supplying the
system if the switchboard is dedicated to the equipment (e.g. an
airconditioning plant room).
2 This Clause need not apply to unitary window or through-wall
airconditioners, nor to heat pump hot water services that are supplied
by a plug and socket-outlet installed adjacent to the unit.
--- End quote ---


--- Quote from: EEVblog on December 06, 2020, 12:54:22 pm ---No isolator switch on mine. Only way to isolate is the 20A breaker for the power points which also takes out half of my house.

--- End quote ---

Also, the regulation I was referring to when you quoted was:


--- Quote ---1.6.5 Electrical installation circuit arrangement
Every electrical installation shall be divided into circuits as necessary
to—
(a) avoid danger and minimize inconvenience in the event of a fault;
and
(b) facilitate safe operation, inspection, testing and maintenance.
NOTE: Clause 2.3 contains requirements for the control and protection of
electrical installations.
--- End quote ---

Which I did not quote partially or misleadingly. Subject to the other loads and usage of the 20A circuit, its use may be allowable with the required isolator. Without said isolator (which is not present and explicitly required), the abuse of that circuit is very likely in breach of 1.6.5 (which is a somewhat subjective regulation, along with 3.9.1, which I quite like, and yes, this installation is in violation of..).

--- End quote ---
Sorry for a large quote, but:
"2 This Clause need not apply to unitary window or through-wall
airconditioners, nor to heat pump hot water services that are supplied
by a plug and socket-outlet installed adjacent to the unit.".

EEVblog:

--- Quote from: Syntax Error on December 06, 2020, 09:36:08 pm ---Would have made more sense to have looped out the 20A line down and back to the HVAC unit, maintaining the rating and integrity of the 20A line - which I'm assuming is a ring? But that would have required two wires and two junction boxes.
--- End quote ---

In this case it looks like they have just cut into the existing 20A wiring to one of the power points in the new room, creating a Y split. This is at the of the already long wiring that goes throughout the house.

EEVblog:

--- Quote from: Vovk_Z on December 07, 2020, 03:28:19 am ---Sorry for a large quote, but:
"2 This Clause need not apply to unitary window or through-wall
airconditioners, nor to heat pump hot water services that are supplied
by a plug and socket-outlet installed adjacent to the unit.".

--- End quote ---

This unit would not be classed as a "through window" or "through wall" unit, it's a "split system".

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