Transport Publication TP 127 E
These Standards may be cited as the Ship Electrical Standards.
Interpretation
In these Standards,
“accommodation spaces” includes public spaces, corridors, lavatories, cabins, offices, crew quarters, isolated pantries and lockers;
“alarm” means the audible and/or visual signal given when a device or system operates outside a predetermined parameter;
“Board” means the Board of Steamship Inspection
“branch circuit” means that portion of a wiring system extending beyond the final overcurrent device protecting the circuit;
“certified” in respect to electrical equipment means certified or listed by a certifying authority;
“certifying authority” means a testing laboratory or facility which are listed in Schedule 2 of this standard;
“certified safe” equipment has been certified safe by a certifying authority for use in a particular hazardous atmosphere;
“communication circuit” means a circuit(s) whereby audible and/or visual information is transferred from one device to another within the vessel;
“continuous rating” are machines suitable for continuous duty at their full rated output at maximum cooling air or water temperature for an unlimited period;
“ C.S.A. ” means the Canadian Standards Association;
“drip-proof equipment” means that the equipment is so constructed that drops of falling liquids have no harmful effect when the equipment is tilted at any angle up to 15 degrees from the vertical;
“demand factor” means the ratio of the estimated consumption of a group of power-consuming apparatus under normal working conditions to the sum of the normal full-load ratings;
“explosion-proof or flame-proof” means, when used in reference to an enclosure, an enclosure that is capable of withstanding without damage, an explosion of a specified gas or vapour that may occur within it, and be capable of preventing the ignition of a specified gas or vapour surrounding the enclosure from sparks, flashes or explosion of the specified gas or vapour within the enclosure;
“factory sealed” refers to an explosion-proof device which is so constructed that external seals are not required;
“flame-retardant” when applied to a material means that the material will not burn for more than a specified period of time nor will the flame travel nor extend beyond a specified distance, as determined under certain test conditions at normal atmospheric pressure;
“hazardous locations” means locations in which explosive accumulations of gases, mixtures or highly flammable substances may be present;
Gas-dangerous space or zone means,
- a space in the cargo area which is not arranged or equipped in an approved manner to ensure that its atmosphere is at all times maintained in a gas-safe condition.
- an enclosed space outside the cargo area through which any piping containing liquid or gaseous products passes, or within which such piping terminates, unless approved arrangements are installed to prevent any escape of product vapour into the atmosphere of that space;
- a cargo containment system or cargo piping;
- a hold space where cargo is carried in a cargo containment system requiring a secondary barrier;
- a hold space where cargo is carried in a cargo containment system not requiring a secondary barrier;
- a space separated from a hold space described in 4.1 by a single gastight barrier;
- a cargo pump-room and cargo compressor room;
- a zone on the open deck, or semi-enclosed space on the open deck, within 3 m of any cargo tank outlet, gas or vapour outlet, cargo pipe flange or cargo valve or of entrances and ventilation openings to cargo-pump-rooms and cargo compressor rooms;
- the open deck over the cargo area and 3 m forward and aft of the cargo area on the open deck up to a height of 2.4 m above the weather deck;
- a zone within 2.4 m of the outer surface of a cargo containment system where such surface is exposed to the weather;
- an enclosed or semi-enclosed space in which pipes containing products are located;
- a compartment for cargo hoses; or
- an enclosed or semi-enclosed space having a direct opening into any gas-dangerous space or zone.
Gas-safe space means, a space other than a gas-dangerous space.
Gas-tight means, the specific quality of a physical barrier to prevent any significant quantity of flammable gas or vapour from entering into an adjoining space.
“ IEC ” means the International Electrotechnical Commission
“ IEEE 45 ” means to the Institute of Electrical and Electronic Engineers Recommended Practice for Electrical Installations on Shipboard.
“increased safety apparatus” means apparatus designed to prevent, in normal working conditions, sparking or arcing and to avoid dangerous temperature rises reached by any part in contact with the explosive mixture; this implies that the construction is such that the risk of sparking or of abnormal temperature rises be very much less than for the standard-type industrial equipment;
“intrinsically safe” means electrical equipment that is so constructed that when installed and operated under the conditions specified by the certifying authority, any electrical sparking that may occur in normal and fault conditions either in the equipment or in the circuit associated therewith, is incapable of causing an ignition within a particular flammable gas or vapour;
“intrinsically safe circuit” means a circuit in which any electrical sparking that may occur in normal and fault conditions specified by the certifying authority, and with the specified components, is incapable of causing an ignition within a particular flammable gas or vapour;
“loop circuit” refers to a circuit of an addressable fire detection system whereby the circuit is capable of being interrogated from either end;
“machinery space” means any space containing propelling machinery, boilers, oil fuel units, steam and internal combustion engines, generators and major electrical machinery, oil filling stations, refrigerating, stabilizing, ventilation and air conditioning machinery and trunks to such spaces;
“machinery spaces of Category A” means all spaces, and trunks to such spaces, which contain:
- internal combustion type machinery used for main propulsion, or other purposes where such machinery has in the aggregate a total power output of not less than 373 kW ; or
- any oil-fired boiler or oil fuel unit;
“main fire control station” refers to a control station in which the control and indication functions for the fire detection and alarm system, fire door indicator and control panel, water tight door controls and indication, general alarm, public address, telephone systems and accommodation and vehicular ventilation controls and indication are centralized;
“monitoring systems” refers to a system which gathers and displays information concerning the operation of machinery or a system;
“ NFPA ” means the National Fire Protection Association
“public spaces” refers to spaces in the accommodation which include bars, dining rooms, halls, libraries, lounges, nurseries, recreation rooms and smoke rooms;
“recognized Classification Society” means the American Bureau of Shipping, Det Norske Veritas, or Lloyds Register of Shipping.
“safety system” refers to a system whereby arrangements to reduce power or shutdown any machine or system which could result in damage, breakdown or hazardous conditions;
“semi-enclosed” locations means locations where natural conditions of ventilation are notably different from those on open decks due to the presence of structures such as deckheads, windbreaks and bulkheads and which are so arranged that the dispersion of gas may not occur.
“service spaces” refers baggage rooms, galleys, laundries, mail rooms, main pantries with cooking facilities, store rooms and workshops clear of machinery spaces and the trunkways leading to such spaces;
“special category spaces” means those enclosed spaces above or below the bulkhead deck intended for the carriage of motor vehicles with fuel in their tanks for their own propulsion; into and from which such vehicles can be driven and to which passengers have access;
“totally enclosed” means that a machine is so enclosed as to prevent the exchange of air between the inside and outside of the case but not sufficiently enclosed to be termed airtight;
“ U.L. ” means Underwriters’ Laboratories;
“valve regulated sealed battery” refers to a battery which reduces the amount of gas released through a pressure relief valve by recombining the products of electrolysis, in this type of battery the electrolyte cannot be replaced;
“vented battery” refers to a battery in which electrolyte can be replaced and releases gas during the charging process;
“watertight” means an enclosure constructed so that a stream of water from a hose not less than 13 millimetres in diameter under a head of 11 metres from a distance of 3 metres can be played on the enclosure from any direction for a period of 15 minutes without leakage;
“weatherproof” means that equipment is so constructed or protected that exposure to the weather, to falling moisture or to external splashing, will not impair the effectiveness of the enclosed equipment.
“zone circuit” refers to a circuit of a fire detection system whereby the circuit to which the devices are connected terminates at the last device with an end of line load;