Department of labour government Notice. R: 1593 12 August 1988 Electrical Machinery Regulations, 1988
(2) The user shall ensure that every fence energiser -
(a) is constructed so as to exclude dust and water; and
(b) is not installed in dusty locations or locations where there is a fire hazard.
(3) The user shall not install a fence energiser which receives its energy from an electric supply system -
(a) in locations where the energiser is likely to sustain mechanical damage or be tampered with;
(b) on any pole of an overhead power or communication line except poles which carry the conductors of the energiser; and
(c) unless the output circuit is isolated from the supply by means of a double-wound isolating transformer.
(4) The user of a fence energiser shall -
(a) cause the earth of every fence energizer to be free and at least 2 m away from the earth of any other electrical system; and
(b) not electrify barbed-wire but only smooth wire or such articles as will enable a person touching it to let go immediately: Provided that smooth wires attached to barbed wire fences may be electrified.
(5) In the case of a fence energizer which receives its energy from a battery charged by means of charging apparatus which receives power from an electric supply, the user shall ensure that the charging apparatus is of double-wound isolation construction.
(6) When an electric fence is installed along a public road or in an urban area the user shall-
(a) as far as is practicable mount the electrified wires or articles in such positions that persons cannot inadvertently come into contact therewith; and
(b) display notices conspicuously, warning people that the property is protected by an electric fence.
12.(1) The chief inspector may approve any organization which performs the prescribed functions with regard to the manufacture or testing of electrical machinery as an inspection authority.
(2) The chief inspector may require an organization contemplated in terms of subregulation (1) to submit to him such particulars of its technical equipment and resources, the extent of the qualifications and experience of its staff and such other matters as he may deem necessary.
(3) The chief inspector may withdraw any approval of an inspection authority at any time.
13.(1) The user shall cause -
(a) roofs, gutters, downpipes and waste-pipes on premises to which electrical energy is supplied to be earthed, except -
(i) where the operating voltage does not exceed 50;
(ii) roofs made of non-conductive material or metal roofs covered by non-conductive material;
(iii) gutters, downpipes and waste-pipes made of non-conductive material or gutters and downpipes attached to a metal roof which is covered by non-conductive material;
(iv) roofs, gutters, downpipes and waste-pipes on premises which receive electricity by means of underground service connections; and
(b) all accessible metallic parts of electrical machinery which, though normally not forming part of an electrical circuit, may become alive accidentally, to be protected by an insulating covering or otherwise enclosed or to be earthed, except -
(i) metal in earth-free situations, other than runs of metal wireway and the close-fitting metal sheathing and armouring of cables;
(ii) short separate lengths of heavy-gauge metal wireway used for the mechanical protection of cables where such cables are not used in the secondary circuits of discharge luminaire installations;
(iii) short, unexposed, separate lengths of metal wireway used for the mechanical protection of insulated wiring passing through walls, floors, partitions or ceilings;
(iv) metalwork of fixed electrical machinery where such metal work is more than 2,4 m above the floor: Provided that this exception shall not apply where such metalwork is situated in any position likely to become damp, or in an elevator shaft, or near rotating machinery, or in contact with a wall, ceiling or other support constructed of or covered with conducting material;
(v) metal parts of electrical machinery where such parts are enclosed or shrouded by insulating material so that such metal parts cannot be touched;
(vi) cleats, clips, saddles, clamps or other devices for fixing wireways and cables;
(vii) shades, reflectors and guards supported on lamp holders or discharge luminaires;
(viii) lamp caps;
(ix) metal parts of or screws in or through non-conducting material which are separated by such material from current-carrying parts and from earthed non-current-carrying parts in such a way that in normal use they cannot become live or come into contact with earthed parts.
(2) If at any time through a test of any electrical installation on a premises by the supplier it is found that the roofs, gutters, downpipes and waste-pipes of the premises or exposed metallic parts of the electrical installations as contemplated in subregulation (1) are not earthed, the supplier shall require the occupier or owner of such premises to effect the necessary earthing within a fixed period of not more than 30 days, and should the occupier or owner fail to comply with such requirements the supplier may disconnect the electrical energy to such premises and shall not reconnect such energy until the earthing has been carried out to his satisfaction: Provided that the provision for the disconnection of the electrical energy shall not apply to premises owned by the State (including a provincial council, the South African Transport Services or the Department of Post and Telecommunications).
14. The supplier or user shall cause the supports for power lines to be so designed as to provide the following minimum factors of safety.
Provided that in calculating the factors of safety the supplier or user shall assume that -
(a) there are no broken conductors;
(b) every line conductor, cable or wire carried by the support is at a temperature of -5°C;
(c) line conductors, together with the supports, are subjected to a wind pressure of 700 Pa; and
(d) in the case of lattice structures the area for calculating the force due to wind pressure is 1.5 times the projected area of the members of one side and in the case of round, elliptical or hexagonal poles, conductors and wires the area is 0.6 times the projected area.
Clearances of power lines
15. (1)The supplier or user shall cause -
(a) The minimum clearances of electric conductors and other wires of power lines, excluding overhead service connections and line conductors having a voltage not exceeding 1.1 kV r.m.s. consisting of insulated wire of a type which complies with a safety standard incorporated for this purpose in these regulations under section 36 of the Act, to be not less than the clearances indicated in the following table:
* Maximum voltage to earth for which insulation is designed.
Provided that these figures are base on the assumption that clearances shall be determined for a minimum conductor temperature of 50°C and a swing angle corresponding to wind pressure of 500 Pa: Provided further that where under normal conditions power line conductors operate at a temperature above 50°C, the clearance at the higher temperature at which the conductors operate shall be in accordance with the clearance indicated in the table;
(b) the clearances of conductors and other wires over the normal high-water level of power lines crossing over water to be not less than the values for power lines above the ground outside townships: Provided that if the owner of the land on which the water is situated requires a greater clearance and no agreement can be reached, the dispute shall be referred to the chief inspector for a decision; and
(c) the distance of any power line from an explosives magazine to comply with the requirements of the Explosives Act, 1956 (Act 26 of 1956).
(2) No person shall construct any road, railway, tramway, communication line, other power line, building or structure or place any material or soil under or in the vicinity of a power line which will encroach on the appropriate minimum clearances prescribed in terms of subregulation (1).
(3) No person shall encroach in person or with objects on the minimum safety clearances prescribed in subregulation (1) or require or permit any other person to do so except by permission of the supplier or user operating the power line.
(4) The supplier or user, of power lines shall control vegetation in order to prevent it from encroaching on the minimum safety clearance of the power lines and the owner of the vegetation shall permit such control.
16. The user shall ensure that all supports of the lattice type which are used to carry overhead conductors are adequately protected in order to prevent any unauthorised person from coming into dangerous proximity of the conductors by climbing such supports, and an inspector may require a user to protect a support of any other type similarly.
Insulators and fittings
17. The supplier or user shall ensure that the factor of safety of line insulators and fittings is at least 2.5 based on the type-tested breaking-strength of such insulators or fittings.
18. The supplier or user shall ensure that the factor of safety of every line conductor, including joints, is at least 2.5, which factor shall be based on the rated ultimate tensile strength of the conductor and shall be calculated on the assumption that the line conductor is at a temperature of -5°C and that it is simultaneously subjected to a wind pressure at right angles to the line equivalent to 700 Pa on 0.6 of the projected area of the conductors.
Overhead service connections and overhead service conductors
19. (1) No supplier or user shall require or permit any overhead service connection to be connected to the supplier's mains elsewhere than at a point of support.
(2) Every supplier or user shall cause every part of -
(a) overhead service connections; and
(b) overhead service conductors from one building to another, to consist of insulated wire of a type which complies with a safety standard incorporated for this purpose in these regulations under section 36 of the Act.
(3) No supplier or user shall connect electrical energy to a building by means of overhead conductors unless the connection to the building is by means of a connector box of a type approved by the chief inspector, or by other means similarly approved.
20. (1) Where a power line crosses a proclaimed road, railway or tramway or a communication line proclaimed by the Postmaster General, the supplier or user shall cause the clearance to comply with the requirements of regulation 15 and shall further cause -
(a) every structure supporting a crossing span to be designed in such a manner that it will be able to withstand the loads that may be imposed upon it should a breakage of any phase conductor or earth conductor occur;
(b) every structure supporting a crossing span, as far as is reasonably practicable, to be located so that it will not touch the service crossed, should it overturn;
(c) subject to the restrictions in paragraph (b), one of the structures supporting a crossing span to be located as close to the point of crossing as is reasonably practicable;
(d) the clearance of the crossing span where it crosses a proclaimed road to be not less than 4.5 m in the case of a broken phase conductor in a span other than the crossing span;
(e) armour rods or arching horns to be fitted at the live ends of suspension and rigid insulators on at least the first three structures on each side of the crossing if the maximum voltage for which the power line is designed exceeds 1.1 kV r.m.s.; alternatively, duplicate conductors, tied together at intervals of not more than 1.5 m shall be provided in the crossing span and shall be supported by duplicate parallel insulators, and for lines on rigid insulators the duplicate conductors shall extend at least 1.5 m beyond the supports on each side of the crossing span;
(f) the deviation from a right angle crossing over a communication line of the Department of Posts and Telecommunications or the South African Transport Services to be not greater than 30 degrees for lines with a voltage of 48 kV r.m.s. and above, and not greater than 45 degrees for lines below 48 kV r.m.s.; and
(g) the clearance to comply with the requirements of regulation 15 and with paragraphs (b) and (c) of this subregulation in cases where a power line crosses another power line:
Provided that the chief inspector may approve any deviation of these requirements as specified in this subregulation subject to such conditions as he may determine.
(2) The supplier or user shall cause every overhead service connection which crosses over bare communication lines of the Department of Posts and Telecommunications to have minimum clearances between the overhead service connection and the communication lines at the points of crossing of 0.5 m and the overhead service connection shall not cross below bare communication lines.
Bare conductors on premises
21. The user shall cause bare conductors other than conductors of a power line which cannot be completely insulated, such as crane trolley wires, and which are installed on premises, to be so placed as to prevent accidental contact therewith and warning notices to be prominently displayed at such conductors.
Schemes to be submitted to the Postmaster General
22. (1) The supplier shall, before commencing the installation of any distribution scheme or extension to a scheme, submit his complete proposals in duplicate to the Postmaster General and, where necessary to the General Manager of the South African Transport Services for the purpose of deciding by mutual agreement the methods of devices to be adopted by the supplier to avoid the creation of conditions on existing and projected communication and railway lines which may be dangerous to the public or to the employees concerned, and where such conditions can be avoided without material cost to either party by the amendment of either the projected plans of the supplier or the projected plans of the Department of Posts and Telecommunications or the South African Transport Services, as the case may be, such amendments shall be made: Provided that this subregulation shall not apply to service connections.
(2) If an agreement between the Postmaster General or the General Manager of the South African Transport Services and the supplier as contemplated in subregulation (1) cannot be reached, the dispute shall be referred to the chief inspector for a decision.
(3) Subject to the provisions of subregulation (4), the supplier shall pay all the costs arising from an agreement referred to in sub-regulation (1).
(4) In cases where an alteration to the design of an existing power line which has been erected in accordance with sub-regulations (1) and (2), or devices additional thereto, becomes necessary on account of representations made by the Postmaster General or by the General Manager of the South African Transport Services or by any other such body, such alteration shall be effected by the supplier at the expense of the body and whose representation the change has been brought about.
Offences and penalties
23. Any person who contravenes or fails to comply with a provision of regulations 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 20, 21 or 22(1) shall be guilty of an offence and liable on conviction to a fine not exceeding R1 000 or to imprisonment for a period not exceeding six months and, in the case of a continuous offence, to an additional fine of R5 or to additional imprisonment of one day for each day on which the offence continues: Provided that the period of such additional imprisonment shall in no case exceed 90 days.
Withdrawal of regulations
24. The following regulations are hereby withdrawn:
(a) Regulations C51 (3), C57 and C64, published under Government Notice R. 929 of 28 June 1963;
(b) regulations C52, C55 and C58, published under Government Notice R. 109 of 26 January 1973;
(c) regulations C56, C59, C60, C61, C62, C63, C65, C66, C67, C68, C69, C70 and C71, published under Government Notice R. 929 of 28 June 1963, as amended by Government Notice R. 1880 of 11 September 1981.
Incorporation of safety standards
Under and by virtue of the powers vested in me by section 36 (1) of the Machinery and Occupational Safety Act, 1983 (Act 6 of 1983), I, Pieter Theunis Christiaan du Plessis, Minister of Manpower, hereby incorporate into the Electrical Machinery Regulations, 1988, the safety standards specified in the Schedule hereto.
P. T. C. DU PLESSIS,
Minister of Manpower.
1. Regulation 8(1)
South African Bureau of Standards, code of practice SABS 0108: The classification of hazardous locations and the selection of electrical apparatus for use in such locations.
South African Bureau of Standards, standard specifications
SABS 314: Flameproof enclosures for electrical apparatus;
SABS 549: Intrinsically safe electrical apparatus;
SABS 969: Enclosures for electrical apparatus (Dust-ignition-proof or hose-proof or both);
SABS 970: Non-sparking electrical equipment for use in Class I, Division 2 locations;
SABS 1031: Type 'e' apparatus for use in flammable gas atmospheres;
SABS 1020: Electrical components for free-standing power-operated dispensing devices for flammable liquids;
SABS 0119: Reduction of explosive hazards by segregation, ventilation and pressurisation of electrical equipment;
British Standards, specifications
B.S. 229: Flameproof enclosure of electrical apparatus;
B.S. 1259: Intrinsically safe electrical apparatus and circuits for use in explosive atmospheres;
B.S. 5501: Electrical apparatus for use in potentially explosive atmospheres, Parts, 1, 3, 4, 5, 6 and 7 (also respectively referred to as EN 50 014, 50 016, 50 017, 50 018, 50 019 and 50 020);
B.S. 4683: Electrical apparatus for explosive atmospheres Parts 2, 3 and 4;
B.S. 4533, Section 102, 51: Luminaires with type of protection N;
British Approvals Service for Electrical Equipment in Flammable Atmospheres
(BASEEFA), SFA standards for flameproof and equivalent equipment;
Verband Deutscher Elektrotechniker (VDE), specification VDE 0171: Construction and testing of electrical apparatus for use in explosive gas atmospheres for industries other than mining;
European Committee for Electrotechnical Standardization, specifications EN 50014 and 50016 to 50020: Electrical apparatus for use in potentially explosive atmospheres;
Underwriters Laboratories (UL) standards for-
(a) explosion proof electrical equipment;
(b) intrinsically safe electrical equipment; and
(c) dust-ignition proof electrical equipment;
National Fire Protection Association (NFPA) standard No. 493 for intrinsically safe equipment in use in hazardous locations;
Factory Mutual Research Corporation, FM standard for intrinsically safe apparatus for use in Class I, Division 1 locations and for non-incentive apparatus for use in Class I Division 2 locations;
Canadian Standards Association (CSA), standards
C22.2 No. 30: Explosion proof enclosures for use in Class I hazardous locations;
C22.2 No. 25: Enclosures for use in Class II, Groups E, F and G hazardous locations;
AS 2480: Electrical equipment for explosive atmospheres: Flameproof enclosures - type of protection 'd'
South African Bureau of Standards, standard specification SABS 743: Low-voltage insulating transformers.
South African Bureau of Standards, standard specification SABS 1157: Double-insulated hand-held electric motor operated tools;
International Commission On Rules For The Approval of Electrical Equipment (CEE), specification for Portable Motor Operated Tools, Publication 20;
British Standards, specification B.S. 2769: Hand-held electric motor operated tools.
South African Bureau of Standards, specification SABS 150: Polyvinyl chloride (PVC)-insulated electric cables and flexible cords.
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