Level 2 specification
NR/L2/TEL/30120
Specification for the Maintenance of Public Address Systems (formerly NR/WI/TEL/30120)
Issue 2, March 2009
Maintenance specification for station public address (PA) systems: scope boundaries with the PA PC and power plant specs, maintainer duties in public areas, and a yearly service covering alarms, test announcements, zones, speakers, cabinets, cabling and records.
Clause map — what each clause deals with
| 1 | Purpose | Sets out a routine inspection regime for telecoms maintainers looking after public address systems, aiming to catch wear and defects before they cause service failures |
| 2 | Scope | Covers anyone maintaining station PA systems for Network Rail or the SFO; PA PCs and the PA power supplies, UPS and batteries are handled by separate maintenance specs |
| 3 | Definitions (in addition to those defined in NR/L2/TEL/31002) | Short list of abbreviations (PC, SFO); other terms come from the parent telecoms maintenance standard NR/L2/TEL/31002 |
| 4 | Responsibilities | Maintainer must avoid disturbing safety-related or in-use equipment without user agreement, protect the public in station areas, avoid peak hours, and report defects via fault control |
| Appendix A | Maintenance of Public Address Systems | Yearly Service A: alarms, audible test announcements, zone controls, speaker condition and aim, local mic and chimes, cabinet seals and locks, exposed cables, terminations, site records, corrosion, then label and log |