P2
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E3D-APAM-RPT-002 · Board Condition Report · Board 60 of 67
DB-B21N
Apron field-lighting board
Status: Complete · Condition Index 21.3/100
1. Verdict & suitability
Assessment summary
Can house the new LED luminaires & controlsYES — universal
BasisLED load ≪ legacy HID; enclosure space & isolation adequate
Overall condition ratingAMBER — Defects logged
P3
3
P4
3
Photos
16
0Condition Index 21.3100
Rated AMBER — Defects logged. The board can house the new LED works.
2. Location
| GPS (lat, long) | -37.667777, 144.852406 |
| Zone / apron | To be confirmed against apron key-plan |
| Upstream source (parent DB / sub) | To be confirmed against airfield reticulation drawings |
| Inspected | 21–22 June 2026 |
3. Supply & electrical
As-built supply and cabling recorded on site. Visual / physical condition audit only — no electrical testing performed.
| Incoming supply & earthing | |
|---|---|
| Supplied from | Switchboard Room 27 |
| Upstream CB way(s) | — |
| Phases | 3-phase |
| Line voltage | 400 V (L-L) |
| Phase-earth voltage | 230 V (L-N) |
| Earthing system | Reticulated |
| Upstream protection | Isolator only (no OCPD confirmed at board) |
| Supply cable schedule | |
|---|---|
| Active conductor size | 16 mm² |
| Configuration | 1x4C |
| Conductor arrangement | circular |
| Parallel sets | 1 |
| Conductor material | Copper |
| Insulation / type | PVC |
| Armour | Unarmoured |
| Installation method | Underground Enclosure |
| Conduit | 100 mm |
| Loaded circuits in conduit | 1 |
| Estimated depth | 0.5 m |
| Earth arrangement | Separate — 6 mm² |
| Approx. length | Not recorded |
Field note (open supply query): Supply: Switchboard Room 27 — resolve looped-vs-dedicated feed arrangement on the F-series 50 mm mains before finalising the outgoing design.
4. Condition assessment
Scored per the Condition Scoring & Rating Model (six standards-referenced dimensions, 0–4 on the P-scale). Rating is gated — a single safety/structural P2 breach sets RED regardless of the averaged Index.
| Dimension | Score | Grade | Observation |
|---|---|---|---|
| Electrical safety & compliance | 1 | Minor (P4) | Direct-contact / earthing / labelling integrity |
| Structural & enclosure integrity | 0 | None observed | None observed |
| Corrosion & protective coating | 2 | Moderate (P3) | Corrosion of fixings, bars and coatings; general fouling |
| Ingress protection | 2 | Moderate (P3) | Sealing of penetrations against dust / water ingress |
| Access & working space | 0 | None observed | None observed |
| Thermal / fire & component | 0 | None observed | None observed |
Rationale. Rated AMBER (Condition Index 21.3/100). Field condition records corrosion to fixings and bars and unsealed penetrations / ingress.
5. Defects
Field-observed defect(s) for this board, itemised into discrete findings — each with its own priority and category.
| Ref | Category | Defect | Pri |
|---|---|---|---|
| D-01 | Corrosion | Significant rust / corrosion to enclosure, fixings and bars | P3 |
| D-02 | Labelling | Degraded / peeling warning and schedule labels | P4 |
| D-03 | Ingress | Unsealed cable penetrations at base / gland plate | P3 |
| D-04 | Ingress | Water ingress / internal staining | P3 |
| D-05 | Housekeeping | Internal dust / dirt accumulation | P4 |
| D-06 | Corrosion | Minor surface rust to fixings and bars | P4 |
6. Suitability for the LED works
Suitability for LED worksYES
The new LED floodlight load and driver footprint are materially smaller than the legacy HID gear removed, and the existing 3-phase supply, 16 mm² feed and cabinet isolation are adequate for the new works. This conclusion is universal across the fleet and is independent of condition.
7. Photographic evidence
16 site photographs. Frames outlined in orange are keyed to a priority defect (fire, structural, access or ingress evidence).
