P2
0
E3D-APAM-RPT-002 · Board Condition Report · Board 20 of 67
DB-NthApron-NEss
Northern apron board
Status: In_progress · Condition Index 20/100
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
2
P4
1
Photos
10
0Condition Index 20100
Rated AMBER — Defects logged. The board can house the new LED works.
2. Location
| GPS (lat, long) | -37.667482, 144.845413 |
| 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 | Sub 42 LV MSB (Non-Essential) |
| Upstream CB way(s) | Q39 |
| Phases | 3-phase |
| Line voltage | 400 V (L-L) |
| Phase-earth voltage | 230 V (L-N) |
| Earthing system | Unknown |
| Upstream protection | Not confirmed |
| Supply cable schedule | |
|---|---|
| Active conductor size | 95 mm² |
| Configuration | 4x1C |
| Conductor arrangement | trefoil |
| Parallel sets | 2 |
| Conductor material | Copper |
| Insulation / type | XLPE |
| Armour | Unarmoured |
| Installation method | Underground Enclosure |
| Conduit | 100 mm |
| Loaded circuits in conduit | — |
| Estimated depth | — |
| Earth arrangement | Separate — 35 mm² |
| Approx. length | Not recorded |
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 | 0 | None observed | None observed |
| Structural & enclosure integrity | 2 | Moderate (P3) | Enclosure & chassis mechanical integrity |
| Corrosion & protective coating | 2 | Moderate (P3) | Corrosion of fixings, bars and coatings; general fouling |
| Ingress protection | 0 | None observed | None observed |
| Access & working space | 0 | None observed | None observed |
| Thermal / fire & component | 0 | None observed | None observed |
Rationale. Rated AMBER (Condition Index 20/100). Field condition records corrosion to fixings and bars.
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 | Severe rust to door mechanism and enclosure | P3 |
| D-02 | Housekeeping | Internal dust / dirt accumulation | P4 |
| D-03 | Corrosion | Minor pitting to enclosure / structure | P3 |
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, 95 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
10 site photographs. Frames outlined in orange are keyed to a priority defect (fire, structural, access or ingress evidence).
