X= Miscellaneous. X is sometimes also used for shutdown (or emergency shutdown) hence "XX". A= Alarm. GN 35-050 (Equipment Identification Specification) gets you to XA, additional X for shutdown may be a local variant.
XXA
Definition
Miscellaneous Shutdown Alarm
xxa means Miscellaneous Shutdown Alarm. X= Miscellaneous. X is sometimes also used for shutdown (or emergency shutdown) hence "XX". A= Alarm. GN 35-050 (Equipment Identification Specification) gets you to XA, additional…
✓ Verified term