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Guide to commercial installations | Part 2 Panelboard: Standards and Regulations
15
To achieve the accuracy of a meter that requires the use of
CT’s, the cable resistance should not exceed a certain value
depending on the power capability of the CT.
The table below gives minimum CSA and maximum lengths.
CT
Max distance from
CT to meter (m)
Minimum cable
size (mm
2
)
SR051
2
1.5
5
4
SR101
2
1
5
2.5
10
4
SR200
2
1.5
5
2.5
SR250
2
1.5
5
2.5
SR300
5
1
10
1.5
SR400
10
1
SR600
10
1