Hach WDMP sc, User Manual, Page: 13 / 74

For installation with conduit:
Note: To supply AC power to the controller with conduit, refer to the controller user manual.
• Install a local disconnect switch or circuit breaker with sufficient current capacity for the panel and
that breaks all mains powered (hot) conductors. Table 3 shows the requirements for the circuit
breaker. Put a label on the disconnect or circuit breaker that identifies it as the main disconnect
device for the instrument. Make sure the local disconnect device is within easy reach of the user
and easy to operate.
• Connect the conduit through a conduit hub that holds the conduit securely and seals the enclosure
when tightened.
• Make sure that the wire insulation has a minimum rating of 300 V, 80 ºC.
• Make sure that the ground wire is 18–14 AWG and connects uninterrupted to the ground stud. Put
an earth ground symbol label on the ground stud.
Table 3 Circuit breaker requirements
Mains circuit Amps
115–120 VAC ≤ 20 A
230 VAC ≤ 10 A
1. Remove the controller and brackets. Refer to the illustrated steps that follow.
English 13