Appendix C – Electrical Isolation Method
Sr. NO.
Electrical Energy Source
Location of LO /
TO point
LO / TO
Isolation Method
1
22KV, 6.6KV source
Breakers on
respective panels
Lock Out & Tag
Out
Rack out +
Grounding &
Discharge
2
415V source
MCC / PDB feeder
Lock Out & Tag
Out
Rack out / Fuse
removal
3
415V or less source with LO
provision
DB / power points
/ control panels
Lock Out & Tag
Out