2410
THE NEW ZEALAND GAZETTE.
[No. 48

208. All live parts shall be so guarded as to prevent accidental contact therewith.

209. The frame of every resistance and control gear shall be provided with a suitable terminal to which the earthing-lead can be connected.

210. Resistances shall be so proportioned and placed that they do not rise to such a temperature as to impair their durability, and they shall be so disposed within their cases that no accessible part of such cases shall rise to a temperature higher than 176° F.

211. Internal connections the temperature rise of which may exceed 86° F. shall not be soldered, and all such connections, unless self-supporting or rigidly fixed in position, shall be continuously insulated with non-ignitable material or beads.

212. Suitable terminals with cable-sockets (preferably made in accordance with British Standard Specification No. 91) shall be provided for the attachment of external leads, and shall be so situated that such leads enter the case below the resistances, and are not exposed at any point to a high temperature.

213. POSITION.

214. Nothing in Regulations 214 and 215 hereof shall apply to apparatus having a capacity of less than 60 watts.

215. (1) All resistances and control gear shall, as far as possible, be placed—
     (a) In positions in which they will not be exposed to risk of mechanical injury or to damage from water, steam, or oil:
     (b) In well-ventilated spaces in which inflammable or explosive gases or dust cannot accumulate.
     (2) Where necessarily exposed to such conditions as aforesaid, resistances and control gear shall be completely enclosed; and if liable to be exposed to inflammable or explosive gases or dust, control gear shall be flame-proof.

216. All woodwork or other combustible material which is within a distance of 24 in. (measured vertically) above, or 12 in. (measured vertically) below, or 6 in. (measured in any other direction) from the frames or cases containing resistances shall be protected with non-ignitable material.

ELECTRIC LIFTS.

REQUIREMENTS AS TO LIFTS.

216. Every electrically operated lift shall be operated from a circuit which is independent of the lighting installation.

217. The trailing-cable shall be multicore, and shall comprise the requisite number of conductors to keep the wiring of the control and each set of safety-devices entirely separate.

218. All cables in the lift or hoist shaft, except trailing-cables, shall be enclosed in Class T metal conduits, the control and motor leads being in separate conduits.

PART VIII.—HEATING, COOKING, AND OTHER APPLIANCES.

HEATING AND COOKING APPLIANCES.

GENERAL CONSTRUCTION.

219. All heating and cooking appliances shall be so constructed and mounted that their supports and those parts which have necessarily to be handled in their operation cannot become heated to a temperature exceeding 130° F. The heating elements shall be of materials durable at the highest temperature to which they attain during use, and be so arranged that they can be readily replaced.

220. The support and frame of every fixed appliance shall be provided with a suitable terminal to which the earthing-lead shall be connected. The conduit shall not be considered as an earthing-lead in this case.

221. (1) The connections between heating elements shall be effected either by parts of the elements themselves or by material having heat-resisting properties similar to those of the elements.
     (2) The junction between the elements and switches or external connecting-leads shall be effected without solder by connectors of types approved by the Chief Electrical Engineer, which shall be so placed that the temperature of no part of the switch or terminal connections can rise above 176° F.

222. All connections between elements or between elements and main terminals shall, unless self-supporting or rigidly fixed in position, be continuously insulated with suitable non-ignitable material.

223. (1) The hot-plates of all electric ranges operated above 110 volts to earth shall be ironclad, and the oven elements shall be so guarded that the cooking-utensils cannot be brought into contact with them, and so that accidental personal contact cannot be made.
     (2) On pressures of 110 volts or lower, open-type elements may be used; provided that if the pressure is reduced from a voltage higher than 110 volts a double-wound transformer shall be used.
     (3) This regulation shall come into force on the 1st day of January, 1923.

224. (1) Each element shall be protected and controlled by a switch and fuse on the live side.
     (2) When a plug-socket is fitted to the appliance it shall have a switch and fuse on the live side, and be so mounted as to secure freedom from electrical hazard. This plug shall have a separate contact connected to earth, and any portable apparatus used from this plug shall be earthed in accordance with the requirements of Part XI hereof.

CONTROL.

225. (1) Appliances shall be protected by a fuse on each live conductor.
     (2) Appliances shall be controlled as a whole by a switch on each live conductor and such switch shall be mounted on the wall adjacent to and within easy reach of such appliance. If more than one switch is so used for any one appliance, all such switches shall be linked.
     (3) The wiring to fixed appliances shall be in screwed conduit connected mechanically and electrically to the metal frame of the appliance: Provided that flexible metallic conduit may be used between the wall and the appliance if connected mechanically to the screwed conduit and the metal frame of the appliance.
     (4) For the purpose of this regulation a fixed appliance is one which is obviously intended by size, weight, and construction to be secured in a fixed position.

PORTABLE APPLIANCES.

226. Portable appliances shall be of such shape or be so weighted that they cannot be easily overturned.

227. (1) Heating-points shall each be rated at not less than 1,000 watts, and shall be controlled by a switch of not less than 8 amperes capacity mounted in accordance with the requirements of subclause (2) of Regulation 179 hereof. For appliances over 1,800 watts the heating-points shall, except in the case of a multiple-earthed neutral system, be controlled by a double-pole switch.
     (2) The minimum size of conductor for any heating-point shall be 3/036 in.
     (3) Switches for heating-points shall not be fixed at a less distance than 12 in. from any switch controlling lighting.

228. All portable heating-appliances shall have at least one section of the heating element controlled solely by a wall-switch.

ELECTRIC WATER-HEATERS.

229. (1) The electric heater shall not be in direct contact with any combustible material, and where the heating element is mounted at a less distance than 6 in. from the bottom of the cylinder the cylinder shall be supported on incombustible material.
     (2) Every heater shall be controlled by a switch fixed in a readily accessible position.
     (3) Conductors to the heater connection-box shall be enclosed in screwed or flexible metallic conduit. Where the conductors are subject to temperatures exceeding those specified in Regulation 131 hereof, the conduit shall terminate in a junction-box approved by the Authorized Inspector, and fixed in an accessible position near the heater. Heat-resisting conductors approved by the Authorized Inspector shall be used between the junction-box and the heater.

230. All water-heaters shall be so arranged and connected that the water entering into or issuing from them is at earth potential.

PROTECTION OF COMBUSTIBLE MATERIALS.

231. Heating and cooking appliances shall not be fixed near combustible materials unless the latter are suitably protected.

MEDICAL AND DENTAL APPLIANCES.

232. Medical and dental appliances shall not be connected direct to circuits of a voltage more than 5 per cent. above the operating voltage of the apparatus. The supply voltage