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T ECHN I CAL DATA

POWE R T RACK MODU L E S

177

124

72.4

75

83

48

96 Ctrs

277

Minimum floor void 50mm

Conditional Short Circuit Rating

TRACK

Short circuit protection provided by fuselinks BS-88 and BS 1361 100 amp

maximum.

Prospective current 16.5kA

Mechanical withstand 10kA peak

Thermal withstand 1200A for 0.1 seconds

TAP-OFF UNITS

Mechanical withstand 10kA peak

Thermal withstand 1200A for 0.1 seconds

Earth Fault Loop Impedance

(measured at 1.0A)

The IEE Wiring Regulations require accurate determination of the total earth

loop impedance, which must be low enough to ensure that the protective

device will operate within the specified time, which for circuits incorporating

socket outlets is 0.4 seconds. The values for the Britmac System for calculating

the earth fault loop impedance are as follows:

Phase busbar

1.97mV/m

Earth busbar to housing

1.38mV/m

Earth busbar (Clean Earth)

1.97mV/m

Track connector

0.37mV

Supply connector

0.24mV

32A tap-off (4mm

2

x 3m), line

9.92mV

Volt Drop, Combined Phase & Neutral

(measured at 1.0A)

Busbar (line & neutral)

3.94mV/A/m

Track connector

0.74mV/A

Supply connector

0.48mV/A

32A tap-off (4mm

2

x 3m), line & earth 19.84mV/A/m

Cable Capacity of Terminals

Supply connector 16mm

2

csa stranded conductor

Construction

TRACK

Body extrusion

Galvanised Steel

Track base

Galvanised steel

Busbar

High conductivity copper

Degree of protection Track IP4X; In-feed housing IP3X C

TAP-OFF UNITS

Standard, Clean Earth and Dual Track tap-offs are non-interchangeable.

All types available in fused and unfused versions.

32A tap-off unit

The 32A tap-off is unfused with 3 metres of 16mm diameter flexible conduit

and 4mm

2

cables to BS 6004:2000 which are terminated in the tap-off via

welded connections.

Fused tap-off unit

Required where conduit lengths greater than 3 metres are used. The tap-off

unit is used as standard at 13 amps and is fitted to the specified length of

16mm diameter conduit and 2.5mm

2

cables to BS 6004:1995 which are

terminated in the tap-off via welded connections. The flexible conduit is

manufactured to BSEN 50086-1

STANDARDS

BSEN 60439: Part 1 & Part 2.

The track system enables compliance with the latest IEE Wiring Regulations,

BS 7671:2008.

TRACK CURRENT RATING

63 amps, 240V ac; 50Hz single phase ambient temperature 25C.

Tap-off

unit

Track

Cable feed end

21.2

20.7

83

69

60

41.9

48

41.9

71

FRONT ELEVATION

SIDE ELEVATION

STANDARD

CLEAN EARTH

DUAL TRACK

All dimensions in mm

83

71

Minimum floor void 73mm

277

TECHNICAL DATA UNDERFLOOR POWER TRACK MODULES

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