| General > General Technical Chat |
| Is this Wiring Legal? (NSW) |
| << < (7/37) > >> |
| Monkeh:
Regional rules not withstanding (and I'm 100% positive that's not compliant anyway), that's a complete clusterfuck of a hackjob. Have a proper electrician deal with it, get your money back from the people who fitted it, and never use them again. --- Quote from: Vovk_Z on December 06, 2020, 05:01:25 am ---I think single isolation wires are not a large problem. Dave can isolate them with an isolating tape, for example, to feel safer. --- End quote --- That is not an acceptable solution for crappy workmanship. --- Quote ---If there isn't a dedicated electrical design project for this wiring then we can't complain about the absence of an individual circuit breaker for each aircon. --- End quote --- Sure you can. This is a fixed, dedicated load and most sensible regulations require such to have dedicated circuits. It is, however, a fairly small load in this case. |
| Monkeh:
--- Quote from: EEVblog on December 04, 2020, 09:44:57 am --- --- Quote from: Ian.M on December 04, 2020, 09:41:15 am ---Its not a local 'sparkie' you should be talking to. You need the opinion of a government 'sparkie' in the code enforcement department. --- End quote --- Yeah, but it would be good to know off the bat if "hell no, that's not up to code" from a local sparky who knows the local regulations. --- End quote --- I am not such, however, I now have a copy of AS3000. It's.. very familiar looking. There does not seem to be a regulation prohibiting connecting an AC unit to an existing socket circuit at this power level, but I am only skimming and lightly searching, it's 600 pages. However, just from one photo it blatently breaches multiple regulations. Let's pick a couple quick ones. --- 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 --- --- Quote ---1.7 SELECTION AND INSTALLATION OF ELECTRICAL EQUIPMENT 1.7.1 General Electrical equipment forming part of an electrical installation shall be— (a) selected and installed to operate in a safe and reliable manner in the course of normal operating conditions; (b) selected and installed so as not to cause a danger from electric shock, fire, high temperature or physical injury in the event of reasonably expected conditions of abnormal operation, overload, fault or external influences that may apply in the electrical installation; and (c) electrical equipment shall be installed in accordance with the requirements of this Standard and the additional requirements as specified in the manufacturer’s instructions. --- End quote --- --- Quote ---3.3.2.8 Other mechanical stresses Wiring systems shall be selected and installed so as to minimize damage to the cable insulation, sheathing and connections during installation, operation and maintenance. Measures undertaken to minimize damage may include the following: (a) Provision of supports, continuous or at appropriate intervals suitable for the mass of the cable. (b) Use of suitable fixings for the cable size and type that hold the cable in position without damage. (c) Use of suitable connections for the cable size and type that reduce mechanical strain at joints and terminations. (d) Attention to minimum bending radius limits of cables. (e) Provision of flexibility to accommodate any movement or tension stresses. --- End quote --- --- Quote ---3.9.1 General Wiring systems shall be installed in accordance with the generally accepted principles of safe and sound practice, using methods that will protect the electrical installation against mechanical or electrical failure under ordinary use, wear and tear, and any abnormal conditions that may reasonably be anticipated. --- End quote --- --- Quote ---3.9.3 Support and fixing 3.9.3.1 General Wiring systems shall be supported by suitable means to comply with Clause 3.3.2.8. Wiring systems shall be fixed in position by suitable clips, saddles or clamps or by means that will not damage the wiring system and that will not be affected by the wiring system material or any external influences. --- End quote --- --- Quote ---3.10.1.1 Insulated, unsheathed cables Insulated, unsheathed cables shall be enclosed in a wiring enclosure throughout their entire length. Exceptions: Wiring enclosures need not be provided for insulated, unsheathed cables installed as follows: 1 As aerial conductors, in accordance with Clause 3.12. 2 In an enclosed wall cavity between an accessory and a wiring enclosure or sheathing terminated within 100 mm of the hole over or within which the accessory is mounted. NOTE: This exception does not apply within a roof space. 3 Within switchboards, metering and similar enclosures, provided that such cables are not exposed to touch during normal switching or meter-reading operations. 4 As earthing or equipotential bonding conductors installed in accordance with Section 5. 5 As an extra-low voltage circuit, in accordance with Clause 7.5. 3.10.1.2 Insulated and sheathed cables Cables of a sheathed type need not be installed in a wiring enclosure. Exception: Cables having insulation or sheath that does not meet the combustion propagation requirements of the AS/NZS 5000 series, e.g. polyethylene-insulated unsheathed cables, shall be installed in fire- rated enclosures. Where the sheath of a cable is removed, the exposed cores of the cable shall be enclosed in accordance with Clause 3.10.1.1. --- End quote --- |
| floobydust:
Electrical safety standards have the same basics as far as junction boxes- screwed down, cable staples, strain reliefs, sufficient room for connections etc. Things fail from a bad connection heating up and melting plastic and touching combustibles. For A/C there is a huge inrush from compressor+contactor combo's so I have seen special regulations calling for a dedicated branch circuit. But this A/C has a VFD so it wouldn't have high inrush. This Wikipedia pic made me happier :) |
| EEVblog:
Another shot. Didn't bother to open it. Have sent a formal complaint and request for it to be fixed. There were three issues: 1) The wiring 2) The shared power point circuit and no way to isolate it without taking out half our house. 3) Bypassing of the obvious Solar Analytics system which has a dedicated aircon power monitoring circuit. |
| Ed.Kloonk:
https://www.facebook.com/5hittyElectrical/ :) |
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