Caution:
Use a locknut or similar mechanism to ensure the integrity of stud-connected PCTs.
Caution:
The r
ecommended minimum PCT wire size is 2.5 mm² for countries whose mains supply
is 230 V (e.g. Europe) and 3.3 mm² for countries whose mains supply is 110 V (e.g. North
America). This may be superseded by local or country wiring regulations.
For P60 products, the recommended minimum PCT wire size is 6 mm². See product
documentation for details.
Caution:
The P
CT connection must have low-inductance and be as short as possible.
Caution:
All connections t
o the equipment must have a defined potential. Connections that are
pre-wired, but not used, should be earthed, or connected to a common grouped
potential.
4.7 PRE-ENERGISATION CHECKLIST
Caution:
Check v
oltage rating/polarity (rating label/equipment documentation).
Caution:
Check CT cir
cuit rating (rating label) and integrity of connections.
Caution:
Check pr
otective fuse or miniature circuit breaker (MCB) rating.
Caution:
Check integrity of the PCT connection.
Caution:
Check v
oltage and current rating of external wiring, ensuring it is appropriate for the
application.
4.8 PERIPHERAL CIRCUITRY
Warning:
Do not open the secondar
y circuit of a live CT since the high voltage produced may be
lethal to personnel and could damage insulation. Short the secondary of the line CT
before opening any connections to it.
P24xM Chapter 2 - Safety Information
P24xM-TM-EN-2.1 21
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