User Manual
1 Publicatio n 1000-UM001B-US-P - July 20 00
Chapter
2
Commissioning Box and Switch
This procedure is to be followed at first time startup and any subsequent SLS
service.
A. Inspection
1. Visually inspect enclosure and components for damage that may
have occurred in installation or shipment. Look for loose wires or
damaged components.
2. F or first time ins t allati on, rem o ve adh e sive pro tect iv e pape r cover
fro m SLS box wi ndow.
3. Check incoming and outgoing three phase power lines for proper
sele ctio n an d sizing . Select per NEC ar ti cle 430 par t B and size per
NEC table 310-16, 75°C column. Note that the preferred wire,
MTW, is rated 90°C, but it must be siz e d per the 75°C column.
4. Check incoming and outgoing lines along with associated line voltage
control wires that attach to the isolation contactor for proper torque.
Re fe r to wirin g dia gra m fo r va lue s. Also chec k tha t the lugs do no t
crimp down on the wire insu la tion.
5. Check to see that the proper class J time delay fuse is installed ahead
of the SLS box. Refer to wiring diagram notes and see item H under
“Installation Instructions”.
6. Check to see that the proper size grounding conductor has been
installed between the ground bus in the main enclosure and the
ground bus in the SLS box (refer to item D under “Installation
Instructions”). Refer to NEC Table 250-66 for sizing.
7. Verify that the SLS switches are connected to the SLS box and that
unneeded SLS switches are jumpered ou t in the Harting conn ectors
as per item E under “Installation Instructions”.
8. Inspect SLS cable installation for protection against damage. Refer to
item C under “Installation Instructions”.
9. If required, check to see that white phenolic nameplate on the SLS
switch cover is engraved as specified. Also check to see that screws
that secure this nameplate to cover are resealed on the inside of cover
when na mep late is re placed. This is to ens ure NEMA Type 4 (IP65)
watertight construction.
10.Verify that the control transformer primary and secondary is
connect ed per the system volta ge per note #4 on wiring diagram
Y-155798. Refer to Appendix A.