GENERAL FIRE SAFETY REQUIREMENTS - GUIDELINES ANNEX


GA 1.2 ELECTRICAL ROOMS, SUBSTATION, SWITCHGEARS AND OTHERS
GA_1.2 - Revisions_2015
Item No. Provisions Notes
1.0

The minimum requirements shall apply to the following:

  • Electrical Rooms and other space/enclosures (utilities / toilets)
  • Substation with minimum 3 meter separation from occupied buildings
  • Substation within the occupied buildings
Type
2.0

Electrical Rooms and other utility space/enclosure:

2.1 Electrical Rooms as defined by NFPA 70 or enclosure of any electrical component and other utility space whose area is less than or equal to 5.1 square meters and with enclosure fire rating of 2-hour shall not be required with any automatic fire extinguishing system (wet or other type).

2.2 Electrical Rooms as defined by NFPA 70 or enclosure of any electrical component and other utility space whose area is exceeds 5.1 square meters shall be provided with appropriate automatic fire extinguishing system (wet or other type).

Electrical Rooms / Spaces
3.0

Substation with 3 meter separation from occupied buildings (STAND ALONE):

3.1 Cable Basements – Below Ground Level

3.1.1 Where these are single storey below ground and escape distances comply with the code, fixed fire extinguishing system will not be required.

3.1.2 Where escape distances exceed the requirements for non-sprinklered occupancies, sprinklers shall be provided.

3.1.3 Where water would be ineffective or the possibility that water could exacerbate the situation or water damage could be significant, alternative protection using clean agents will be acceptable. Carbon Dioxide (CO2) total flooding systems will not be accepted in cable basements under any circumstances.

3.2 Construction shall comply with NFPA 101 and 5000 requirements.

3.3 Clean Agent systems shall be permitted to be installed where required by NFPA 101.

3.4 Notwithstanding, the entire construction shall be installed with fire alarm system (smoke/heat detector or multi-criteria type, call points and audible notification-outside) in compliance to the latest edition of NFPA 72.

3.5 For Oil-filled type transformer, an explosion prevention system shall be provided.

Stand Alone Substation
4.0

Substation within occupied buildings:

4.1 The fire extinguishing requirements of NFPA 101 that apply for the building shall also apply to these substations and related rooms.

4.2 Where the introduction of water would present additional hazards such as electrocution, clean agent systems shall be permitted in substitute for automatic fire sprinkler system.

4.3 For Oil-filled type transformer, an explosion prevention system shall be provided.

4.4 The removal of automatic fixed fire extinguishing systems shall be permitted if all the following conditions are met.

  • The room is dedicated to electrical equipment only
  • Dry type electrical equipment is utilized
  • Enclosure shall be within a 3-hour minimum fire rating including penetrations
  • No combustible storage is permitted in the room
  • Appropriate fire alarm system(smoke/heat detector or multi-criteria type, call points and audible notification-outside) is provided and monitored by the main fire alarm panel
Substation in building