House Wiring: Electrical Building Wire
STEP earned name & trust in house wires which inspire confidence in consultants, architects and builders. Step has built up a reputation and solid integrity. Step house wires carry a guarantee that far exceeds the ISI Certification they possess. Tested at every stage and supervised by experienced engineers, due to customer segments our name in both Indian and world markets.
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Properties of STEP Wires |
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Feature |
Normal PVC Wire |
Heat Resistance HR-PVC |
Fire Retardant FR-PVC |
Fire Retardant Low Smoke FRLS |
Zero Halogen Low Smoke |
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Insulation Material |
PVC |
PVC |
Spl. PVC |
Spl. PVC |
Spl. Polymer |
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Insulation Property |
Normal |
Good |
Good |
Good |
Very Good |
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Temperature Rating |
70 Deg' C |
85 Deg' C |
70 Deg' C |
70 Deg' C |
85 Deg' C |
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Thermal Stability |
Normal |
Very Good |
Good |
Good |
Very Good |
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Flame Retardancy |
Good |
Good |
Very Good |
Very Good |
Excellent |
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Safety during Burning |
Average |
Average |
Good |
Good |
Excellent |
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Requirement of Oxygen to catch fire (% in air) |
>21 |
>21 |
>30 |
>30 |
>35 |
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Temperature required to Catch Fire (with 21% oxygen) |
Room Temp. |
Room Temp. |
>250 Deg' C |
>250 Deg' C |
> 300 Deg' C |
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Visibility during Cable Burning (%) |
<20 |
<20 |
<35 |
>40 |
>80 |
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Release of Halogen Gas during burning (% by weight) |
<20 |
<20 |
<20 |
<20 |
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Zero Abrasion Resistance during Installation |
Good |
Good |
Good |
Good |
Good |
CONDUCTOR
Flexible copper conductors are made from high conductivity Copper rods of 8mm diameter. The rod is drawn to required sizes of fine wires for the construction of conductors of different areas of cross section. Annealed plain copper conductors used in the flexible cables and cords conform to the requirements of table 3 class 5 of IS: 8130-1984. The construction of conductor is also made according to customer specification.
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Single Core Unsheated Flexible Cable in Voltage Grade 1100v. |
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Nominal cross sectional area of Conductor |
Number/ Nom. Dia. of wire |
Nominal Thickness of Insulation |
Overall Diameter (Approx.) |
Current carrying capacity# 2 cables, single phase |
Max. resistance of Conductor per km @ 20 |
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In conduit/ Trunking Amps. |
Unendosed - clipped directly to a surface or on cable tray |
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Sq. mm |
mm |
mm |
mm |
Amps. |
Amps. |
Ohms. |
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0.75 |
24/0.2* |
0.6 |
2.4 |
6 |
1 |
26 |
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1 |
14/0.3* |
0.7 |
2.8 |
11 |
12 |
18.1 |
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1.5 |
22/0.3* |
0.1 |
3.2 |
13 |
16 |
12.1 |
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2.5 |
36/0.3* |
0.8 |
3.8 |
18 |
22 |
7.41 |
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4 |
56/0.3** |
0.8 |
4.5 |
24 |
29 |
4.95 |
INSULATION
PVC insulations & other insulations like, FR PVC I FRLS PVC / HR PVC / ZERO HALOGEN & TEFLON (PTFE) With HR PVC. 'Type A' PVC Compound suitable for PVC insulation confirming to IS: 694: 1990 FR PVC insulation has fire retardant properties. It restricts the spread of fire. FRLS PVC insulation has better fire retardant properties & also emits Low Smoke, in case of fire.
HR PVC INSULATION
HR PVC Insulation HR PVC Insulation ensures insulation stability at conductor temperature of 85C & I05C, in case of HR85 & HR 105PVC insulation respectively.
Standard Colours: Black, Red, Blue, Yellow, Green. (for earthing) Supplied in 90 metre lengths in attractive cartons. Confirm to 1S-694 -1990.
* As per conductor class 2 of IS : 8130/1984 ** As per conductor class 5 of IS 8130/1984 #As per IS 3961 art V)-1968
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6 |
84/0.3 |
0.8 |
5.4 |
31 |
37 |
330 |
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10 |
140/0.3 |
1 |
6.8 |
42 |
51 |
1.91 |
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16 |
101/0.45 |
1 |
8M |
57 |
68 |
1.21 |
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25 |
158/0.45 |
1.2 |
10 |
71 |
86 |
0.78 |
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35 |
220/0.45 |
1.2 |
11.1 |
91 |
110 |
0.554 |
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50 |
315/0.45 |
1.4 |
13.2 |
120 |
140 |
0.386 |
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House Wiring Suppliers in 90 meters lengths in Polythene & Cloth Packing Standard Colours: Red, Yellow, Blue & Black |
Confirm to 15:694/1990. |
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* Sample card available on request. (I to 4 Sq. mm.) |
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ZERO HALOGEN INSULATION
ZERO HALOGEN Insulation provides better flame retardant properties then HR & FRLS. Zero Halogen required > 300 Deg'C temperature to catch fire (with 1% Oxygen).
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Single Core Unsheathed Flexible Cables in voltage grade 1100 Volts |
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2 |
28/0.3 |
0.8 |
3.4 |
17 |
20 |
9.4 |
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4.5 |
65/0.3 |
0.9 |
4.85 |
28 |
33 |
4.08 |