Nov. 26.] THE NEW ZEALAND GAZETTE. 2469

or distribution electric-lighting wires intersect telegraph or telephone wires as may be required by the Commissioner to be so protected. The Corporation shall bear the expense of such guard-wires in all cases where an electric-lighting wire intersects a telegraph or telephone wire previously existing.

39. Every aerial line, including its supports and all the structural parts and electrical appliances and devices belonging to or connected with the line, shall be duly and efficiently supervised and maintained as regards both electrical and mechanical conditions.

40. An aerial line shall not be permitted to remain erected after it has ceased to be used for the supply of energy, unless the Corporation intends within a reasonable time again to take it into use.

41. All metal pipes or casings containing any electric line shall be efficiently connected with earth, and shall be so jointed as to make good electrical connection throughout their whole length.

42. The Corporation shall be responsible for all electric lines, fittings, and apparatus belonging to it, or under its control, which may be upon a consumer’s premises, being maintained in a safe condition and in all respects fit for supplying energy.

43. In delivering the energy to a consumer’s terminals the Corporation shall exercise all due precautions so as to avoid risk of causing fire on the premises.

44. All electric lines and apparatus placed on a consumer’s premises shall be highly insulated, and be suitable for the voltage at which supply is being given, excepting such parts as are required to be connected with earth, and thoroughly protected against injury to the insulation or access of moisture, and any metal forming part of the electric circuit shall not, unless efficiently connected with earth, be exposed so that it can be touched. All electric lines shall be so fixed and protected as to prevent the possibility of electrical discharge to any adjacent metallic substance.

45. The Corporation shall fix, where their service mains for supply at 110 volts terminate on any premises, double-pole well-protected fuses of at least 2 in. clear break. Double-pole main switches shall also be fixed, of ample carrying-capacity, well insulated, with quick break of sufficient clearance to prevent arcing.

46. The wiring of new installations and of existing installations that may be rewired shall be done from distributing-boards, which shall be of incombustible material. Suitable fuses on each pole fitted to engage in spring clips shall be placed on these boards, so that it shall be possible to disconnect any or all circuits from the supply. If double-pole switches be used on the distributing-board circuits, fuses need not then be of the type to engage in spring clips.

47. The covers of fuses, switches, and plugs should be of porcelain or other incombustible non-conducting material, or of rigid metal lined with vitreous enamel or suchlike substance. All metal parts liable to be touched must be effectively insulated from the electrical circuit.

48. There must be a porcelain bridge or other efficient insulation between the terminals of lamp-holders, and where lamp-holders are liable to be handled by persons making good earth contact they must be provided with non-conducting covers. Not more than ten sixteen-candle-power lamps, or their equivalent, shall be controlled by each switch.

49. The insulation-resistance of conductors used for the wiring for lighting or heating purposes shall not be less than 600 megohms per mile after one minute’s electrification and twenty-four hours’ immersion in water immediately preceding the test. Concentric conductors may be used, and their insulation-resistance shall not be less than that required for separate conductors.

50. All arc lamps shall be so guarded as to prevent pieces of ignited carbon or broken glass falling from them, and shall not be used in situations where there is any danger of the presence of explosive dust or gas.

51. Arc lamps used in any street for public lighting shall be so fixed as not to be in any part at a less height than 10 ft. from the ground.

52. Arc lamps used in any street for private lighting shall be so fixed as not to be in any part at a less height than 8 ft. from the ground, and shall be so screened as to prevent risk of contact with persons.

53. Arc lamps must be insulated from earth, and fixed so that they cannot swing into contact with any substance, metallic or otherwise, that might connect them to earth. They may be supplied with current from the two outer wires of the supply system. The insulation resistance of the conductors supplying them with current shall not be less when the current is taken from two outer wires than 2,500 megohms per mile after one minute’s electrification and twenty-four hours’ immersion in water immediately preceding the test. Resistances for the regulation of arc lamps shall be mounted on incombustible bases, shall be so placed that they cannot by conduction or radiation set fire to any contiguous materials, and shall be of ample size to safely carry the maximum current that will normally flow through them. Each arc-lamp circuit shall be provided with a double-pole switch and with a fuse on each pole.

54. Motors shall be either of the enclosed type or enclosed in strong metal cases, and shall be efficiently ventilated.

55. The magnet, frame, and shaft of all motors shall be connected to an efficient earth by a copper conductor, capable of carrying without overheating twice the fusing-current of the main fuse. All metal casings of switches, resistances, fuses, cables, and wires shall be efficiently earthed in a similar manner.

56. An approved starting switch and resistance shall be used on all motors connected directly with the mains, so arranged that the current can only be gradually increased.

57. Every motor must be controlled by an efficient double-pole quick-break switch suitable to prevent arcing, and conveniently placed so that the person in charge of the motor can cut off wholly the supply from the motor, and all devices in connection therewith. This switch should interlock with the starting-switch so that while it can be operated to cut off the supply in any position of the starting-switch, it can only be closed when the starting-switch has been placed so as to put all the resistance in circuit.

58. A minimum-current cut-out must be provided to disconnect the motor should the supply become interrupted. This arrangement may be in the starting-switch if found convenient.

59. Efficient single-pole fuses or other automatic cut-out must be provided to efficiently protect the conductors on each pole from excess of current.

60. Every precaution shall be taken in choosing positions for and in the wiring and setting up of motors, and the necessary devices in connection therewith, so that there shall be no danger of fire being caused by their normal or abnormal action, or of shock being obtained in the ordinary handling thereof.

61. Terminals of motors supplied at 220 volts must be so guarded that they cannot be accidentally touched or short-circuited.

62. The conductors used for the wiring to motors shall have an insulation-resistance of not less than 600 megohms per mile.

63. The insulation-resistance of each motor-circuit, including all devices necessary for the working of the motor, shall be not less than 1 megohm to earth when all metal parts that are required to be connected to earth are so connected.

64. A printed notice shall be fixed in a conspicuous position at every motor and switchboard forbidding unauthorised persons to touch the motors or apparatus, and no alterations shall be made during the time that current is on either pole of that part of any lighting or motor circuit to which alterations may be required.

65. The Corporation shall not connect the wires and fittings on a consumer’s premises with its mains, or, in the case of premises already connected, continue the supply from its mains, unless it is reasonably satisfied that the requirements of this license are complied with, that the wiring and fittings are suitable for the voltage at which supply is being given, and that the connection or continuance of supply would not cause a leakage from those wires and fittings exceeding one ten-thousandth part of the maximum supply-current to the premises; and where the Corporation declines to make such connection or to continue supply it shall serve upon the consumer a notice stating its reasons for so declining.

66. If the Corporation is reasonably satisfied, after making all proper examination by testing or otherwise, that the wiring and fittings are not suitable for the voltage being employed, that a leakage exists at some part of a circuit of such extent as to be a source of danger, and that such leakage does not exist at any part of the circuit belonging to the Corporation, or that any other requirements of this license are not complied with, then and in such case any officer of the Corporation duly authorised by it in writing, or, if the Corporation so require, on application by it to the Electric Telegraph Commissioner, any officer of the Post and Telegraph Department (hereafter referred to as an “Electric Inspector”) instructed to so act, may, for the purpose of discovering whether the leakage exists at any part of a circuit within or upon any consumer’s premises, whether the wiring is suitable and the general requirements of the license are complied with, by notice require the consumer at some reasonable time after the service of the notice to permit him to inspect and test the wires and fittings belonging to the consumer and forming part of the circuit.

In any case where the Corporation requires the services of an Electric Inspector under this section it shall pay the cost of such inspection.

If on such testing and inspection the officer or the Electric Inspector discovers a leakage from the consumer’s wires exceeding one ten-thousandth part of the maximum supply-current to the premises, that the requirements of this license are not properly conformed to, or if the consumer does not