2-8
Terminals common to all inverters
Recommended wire size
AWG (mm
2
)
Remarks
Auxiliary control power input terminals [R0] and [T0]
14 (2.1)
2 HP or above
Auxiliary fan power input terminals [R1] and [T1]
230 V series with 60 HP or above
460 V series with 125 HP or above
(2) Arrangement of control circuit terminals (common to all inverter types)
Terminal type
Screw size: M3 (0.7 N·m)
Spring (screwless)
Recommended wiring size
(mm
2
)*
0.75
0.65 to 0.82 (AWG 19 or
18)
* Using wires exceeding the recommended sizes may lift the front cover
depending upon the number of wires used, impeding keypad's normal
operation.
2.3.3 Wiring precautions
Follow the rules below when performing wiring for the inverter.
(1) Make sure that the source voltage is within the rated voltage range specified on the nameplate.
(2) Be sure to connect the three-phase power wires to the main circuit power input terminals L1/R, L2/S and L3/T of
the inverter. If the power wires are connected to other terminals, the inverter will be damaged when the power is
turned ON.
(3) Always connect the grounding terminal to prevent electric shock, fire or other disasters and to reduce electric
noise.
(4) Use crimp terminals covered with insulated sleeves for the main circuit terminal wiring to ensure a reliable
connection.
(5) Keep the power supply wiring (primary circuit) and motor wiring (secondary circuit) of the main circuit, and control
circuit wiring as far away as possible from each other.
(6) After removing a screw from the main circuit terminal block, be sure to restore the screw even if no wire is
connected.
(7) Use the wiring guide to separate wiring. For inverters of 5 HP or below, the wiring guide separates the main circuit
wires and the control circuit wires. For those of 7.5 to 40 HP, it separates the upper and lower main circuit wires,
and control circuit wires. Be careful about the wiring order.
e.g. EQ7-4005-C
e.g. EQ7-2020-C
Preparing for the wiring guide
Inverters of 20 to 40 HP (three-phase, 230 V series) are sometimes lacking in wiring space for main circuit wires
depending upon the wire materials used. To assure a sufficient wiring space, remove the clip-off sections (see
below) as required with a nipper. Note that the enclosure rating of IP20 may not be ensured when the wiring guide
itself is removed to secure a space for thick main circuit wiring.
