Hach sc1000 user manual Electrical installation, Installation in hard-wired applications

Installation

3.4 Electrical installation

DANGER

Electrocution hazard. Only qualified personnel should conduct the installation tasks described in this section of the manual.

DANGER

Electrocution hazard. Always install a ground fault interrupt circuit (GFIC)/ residual current circuit breaker (rccb) with a maximum trigger current of 30 mA. If installed outside, provide overvoltage protection.

If installed outdoors, provide overvoltage protection between the power and the sc1000 controller. Make sure the data and power cables do not cause tripping and do not contain any sharp bends. Refer to Figure 7 for housing breakout information.

High-voltage wiring for the controller is conducted behind the high voltage barrier in the controller enclosure. The barrier must remain in place unless a qualified installation technician is installing wiring for power, alarms, or relays. See Figure 9 for barrier removal information.

The instrument can be wired for line power by hard-wiring in conduit or by wiring to a power cord if allowed by local electrical code. A local disconnect designed to meet local electrical code is required and must be identified for all types of installation.

Do not connect the electrical power supply to the AC power until the sc1000 controller has been fully wired, fused, and the high voltage barrier and probe module cover have been replaced.

3.4.1 Installation in hard-wired applications

In hard-wired electrical applications, the power and safety ground service drops for the instrument must be 18 to 12 AWG. A sealing-type strain relief must be used to maintain the IP65 environmental rating. See Figure 6 for strain relief and conduit opening sealing plug assembly. See Figure 13 for wiring information.

Note: There is no on/off switch to disconnect the probe module from AC Power.

16