User Manual

6 Watlow Silver Series OIT Installation Guide
0600-0069-0000 Rev D
- Connect the control panel to earth ground using a copper
grounding rod close to the OIT and control panel.
Hinged doors on control panels do not provide a long-term electrical
connection to the rest of the enclosure. Corrosion develops over time and
prevents good electrical contact. For this reason, a separate wi r e braid
should be installed from the hinged control panel to the rest of the
enclosure.
Connect OIT Cha ssis Ground to C ont rol Panel
To reduce the possibility of electrical interference, connect the chassis
ground terminal of the OIT to a clean earth ground. If the control panel
is metal, make sure it is properly grounded. Then connect a short heavy-
gauge wire (#1 4 AWG) from the chassis ground terminal of t he OIT to a
mounting bolt on the control panel door. The mounting bolt must have
good electrical contact to the control panel; scrape away any paint t hat
may be covering the panel to provide a good connection.
NOTE: If the control panel is made of a non-conductive material, it is
essential that you connect the chassis ground terminal of the OIT to a
clean earth ground point located close to the panel.
Figure 2: Chassis Ground Connection