7.
Connect equipotential earth bonding at external earth connection for equipoten-
tial compensation (U-bracket with symbol ).
Figure 16: External earth connection
Table 9:
Terminal cross sections and PE connection tightening torques
Tightening torques
Terminal cross sections
Type of conductor
2.2 ft-lb – 3 ft-lb [3 – 4 Nm]
2 x 14 AWG to 10 AWG [2 x 2.5
mm² to 6 mm²]
Solid wire and stranded
2.2 ft-lb – 3 ft-lb [3 – 4 Nm]
2 x 16 AWG to 12 AWG [2 x 1.5
mm² to 4 mm²]
Fine stranded
For fine stranded (flexible) wires, connection is made via cable lugs/ring terminals. When connecting
two individual wires with a U-bracket, cross sections have to be identical.
5.3.1.3. Terminal compartment: close
Figure 17: Close terminal compartment
[1]
Cover
[2]
Screws for cover
[3]
O-ring
[4]
Blanking plug
[5]
Connection frame
1.
Clean sealing faces of cover [1] and connection frame [6].
2.
Preserve joint surfaces with an acid-free corrosion protection agent.
3.
Check whether O-ring [3] is in good condition, replace if damaged.
4.
Apply a thin film of non-acidic grease to the O-ring and insert it correctly.
21
FQMEx 05.1 – FQMEx 12.1
FM version (Class/Division System)
Electrical connection
