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Cable Size

This document provides a cable selection chart for electrical wiring. It recommends appropriate cable cross-sectional areas and earth cable sizes for different circuit breaker ratings ranging from 6A to 1600A. It also includes recommendations for transformer cable sizes based on transformer ratings from 1000KVA to 2500KVA, as well as standard current transformer sizes and their corresponding bus bar sizes.

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Ahamed Ashith
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28K views2 pages

Cable Size

This document provides a cable selection chart for electrical wiring. It recommends appropriate cable cross-sectional areas and earth cable sizes for different circuit breaker ratings ranging from 6A to 1600A. It also includes recommendations for transformer cable sizes based on transformer ratings from 1000KVA to 2500KVA, as well as standard current transformer sizes and their corresponding bus bar sizes.

Uploaded by

Ahamed Ashith
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLSX, PDF, TXT or read online on Scribd
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CABLE SELECTION CHART

Circuit
Breaker
Rating
(amps)

Recommended
Recommended
Cable Cross
Earth Cable
Section Area
(mm)
(mm)

CIRCUIT
BREAKER SIZE

6A / 10A
16A
20A
32A
40A
40A / 63A
63A / 80A
100A
125A

1.5 mm
2.5 mm
4 mm
2X4mm / 6 mm
10 mm
16 mm
25 mm
35 mm
35mm / 50 mm

1.5 mm
1.5 mm / 2.5 mm
2.5 mm / 4 mm
2X4mm/ 6 mm
10 mm
16 mm
16 mm
16 mm / 25 mm
16 mm / 25 mm

6A
10A
16A
20A
32A
40A
63A
80A
100A

160A

70 mm

35 mm

125A

180A
200A

95 mm
120 mm

50 mm
70 mm

160A
180A

200A ,
300A
400A
600A

250A

150 mm

95 mm

200A

800A

300A
350A

185 mm
240 mm

95 mm
120 mm

220A
250A

1200A
1600A

400A

300 mm

150 mm

300A

2400A

TR SIZE
1000 KVA
1500 KVA

350A
400A
630A
1000A
1200A
1600A
2000A
2500A

BUS BAR
:
:
:

TRANS FORMER CABLE SIZE


BREAKER IN
CABLE SIZE IN
EARTH CABLE SIZE
LVP
mm
1600A
2500A

7 X 1C X 630 mm
11 X 1C X 630 mm

2 X 1C X 150 mm
2 X 1C X 150 mm

CT's
STANDARD
SIZE
200 / 5
300 / 5
400 / 5
600 / 5
800 / 5
1200 / 5
1600 / 5
2400 / 5

BUS BAR SIZE


20mm X 10mm
30mm X 10mm
50mm X 10mm
(or) 2 X 30mm X
10mm
2 X 60mm X
10mm
2 x 80mm X
10mm (or) 2 x
100mm X 10mm

RMER CABLE SIZE


EARTH CABLE SIZE IN mm
2 X 1C X 150 mm
2 X 1C X 150 mm

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