Specifications

Design Guidelines & Procedures Version 18 ©
Electrical Services Section 20.00 / Page 21
Mt Gravatt - Simplex Model 2320 situated in Room 2.01A, M10 Social Sciences Building.
Gold Coast - Simplex Model 2351 situated in the Main Switchroom on Level 1 of the G01
Business 1 Building.
Queensland Conservatorium, South Bank - Simplex Model 6400 situated in Switchroom 1.04.
of the S01 Conservatorium Building.
Queensland College of Art, South Bank – Simplex Model 6400 situated in Room 1.24 of the
S03 Grey St Studios Building.
Logan - Simplex Model 6205 situated in Room 1.11 of the L03 Information Services Building.
The Master Clock provides control impulses via a Type 2811-1004 Booster Relay to the clocks in
a building via colour coded, 2 core, 4mm² shielded risers and 2.5mm² tap-off to each floor
terminating in a ‘Clipsal 408/3A’ recessed plug base.
Clocks shall be ‘Simplex Impulse’ Type 0054-32 J-Dial (230mm diameter) or Type 0054-42 J-Dial
(305mm diameter). Generally the standard clock shall be the 305mm dia. model.
Video Conferencing Rooms shall have a 24 hour LED digital clock suitably sized for the size of
the room and located on the wall opposite the monitors.
In acoustically sensitive areas, provide a 24 hour LED digital clock.
Wiring for the clock system shall be black in colour.
20.14.03 Clocks in New Buildings
An Ethernet Clock system shall be installed in all new buildings. Refer to Section 21.00
Communications & Data Services for all details of the clocks and installation.
20.15 Underground Electrical Services
All underground electrical services shall be installed in conduit in accordance with the
requirements of AS 3000 and shall be laid in sand with 75mm below and 150mm above and to
sides. Conduits shall be laid side by side and not one above the other.
All underground cable shall be identified by laying an approved continuous PVC marker tape
300mm min. above the conduit.
Trenches shall be backfilled only with selected fill and compacted in layers not exceeding 200
mm to a relative density of 90%. The minimum cover shall be in accordance with AS 3000 and
not less than 600mm to the top of conduit. Concrete cover to conduits at a lesser depth will be
allowed only with the written approval of the Superintendent.
The minimum size of underground conduit shall be 25mm diameter. All spare in-ground conduits
shall be fitted with a 2.5mm
2
TPI cable as a draw wire.
All underground cable shall be double insulated cable, not less than 2.5mm
²
. Jointing of
underground cables is not acceptable.
Maximum distance between pits on underground cable runs shall be 60m. All pits shall have their
lids marked with a brass plate indicating the service installed and the route from the pit, and shall
be adequately drained.
Brass marker plates with lettering not less than 10mm high shall be installed on the building
external wall at entry/exit points, at kerbs and road crossings and any changes in direction. The
plate shall also include an arrow showing the direction of the cable run. In unpaved areas, the
marker shall be set in a concrete pad not less than 300mm square x 200mm deep.
Separation distances to other services in the same trench shall be in accordance with the
requirements of AS 3000 and AS 3500.