General > General Technical Chat
Is this Wiring Legal? (NSW)
Syntax Error:
@Monkeh - in those standards you have there, what does it say about unfused spurs that do not terminate in a fused connection? It seems Dave's HVAC is 'hardwired' to a spur off the 20A line?
Uk-wise, this practice would make me nervous as the spur might not have sufficient rating to survive a short at the HVAC unit end; not without excessive heating. Remembering a cable is down rated when stowed behind insulation.
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.
Just a thought, do Aussies have fused plugs like us Brits? They certainly have our 'empire' red and black cable color codes.
Monkeh:
--- Quote from: Syntax Error on December 06, 2020, 09:36:08 pm ---@Monkeh - in those standards you have there, what does it say about unfused spurs that do not terminate in a fused connection? It seems Dave's HVAC is 'hardwired' to a spur off the 20A line?
--- End quote ---
It's not a ring, so there is no such thing as a spur. It's a radial branch and that in itself is (probably, I don't see why they'd change that) totally fine.
Someone:
--- 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.
coppercone2:
--- 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 ---
It's sad that the negotiations turned into gunpoint threats so quickly. Some times 'common guys...' is enough.
Monkeh:
--- 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..).
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version