If you installed a safety switch, make sure that the EMC protection continues from the start
of the cables until their ends.
5.2
UL STANDARDS ON CABLING
To obey the UL (Underwriters Laboratories) regulations, use a UL-approved copper wire with
a minimum heat resistance of 60 or 75 °C (140 or 167 °F). To obey the standards, use cables
with +90 °C (194 °F) heat resistance for sizes 0170 2 and 0168 5 (FR8), and 0261 2, 0261 5,
0300 2 and 0300 5 (FR9).
Use Class 1 wire only.
When the drive has Class T and J fuses, you can use it on a circuit that gives a maximum of
100 000 rms symmetrical amperes, and a maximum of 600 V.
The integral solid state short circuit protection does not give a branch circuit protection.
Obey the National Electric Code and any additional local codes to get the branch circuit
protection. Only fuses give the branch circuit protection.
For the tightening torques of the terminals, see Table 35 The tightening torques of the
terminals and Table 38 Tightening torques of the terminals.
5.3
CABLE DIMENSIONING AND SELECTION
We recommend the fuse type gG/gL (IEC 60269-1). To make a selection of the fuse voltage
rating, refer to the mains. Do not use larger fuses than what is recommended.
Make sure that the operation time of the fuse is less than 0.4 seconds. The operation time
agrees with the fuse type and the impedance of the supply circuit. For more information on
faster fuses, speak to the manufacturer. The manufacturer can also recommend some aR
(UL recognised, IEC 60269-4) and gS (IEC 60269-4) fuse ranges.
The tables show the typical sizes and types of cables that you can use with the AC drive. In
the selection of cables, refer to local regulations, cable installation conditions and cable
specification.
The dimensions of the cables must agree with the requirements of the standard
IEC60364-5-52.
•
The cables must be PVC-isolated.
•
The maximum ambient temperature is +30 °C (86 °F).
•
The maximum temperature of the cable surface is +70 °C (158 °F).
•
Use only cables with a concentric copper shield.
•
The maximum number of parallel cables is 9.
When you use parallel cables, make sure that you obey the requirements of the cross-
sectional area and the maximum number of cables.
For important information on the requirements of the grounding conductor, see chapter 2.4
Grounding and earth fault protection.
For the correction factors for each temperature, see the standard IEC60364-5-52.
VACON · 46
POWER CABLING
5
TEL. +358 (0)201 2121 · FAX +358 (0)201 212 205
