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E3D-APAM-RPT-002 · Board Condition Report · Board 22 of 67
DB-D17W
Northern apron board
Status: Complete · Condition Index 48.8/100
1. Verdict & suitability
Assessment summary
Can house the new LED luminaires & controlsNO — board to be replaced first
BasisObsolete chassis; circuit protection no longer procurable — see below
Overall condition ratingRED — Major defect
P3
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P4
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Photos
15
0Condition Index 48.8100
Rated RED. This board is to be replaced by APAM before the works proceed at this pole; the new LED works are to be installed in the replacement board. Field condition records significant structural / enclosure damage and corrosion to fixings and bars.
Replacement required before the works. This board is built on an obsolete Terasaki Safe-T chassis, and the circuit protection it accepts (Safe-T SRCB2030 MCB/RCD and TH-5-SE control CBs) can no longer be purchased. The board therefore cannot be re-protected or maintained for the works, and a chassis and protection-only refurbishment is not possible. This board is to be replaced by APAM to facilitate the electrical installation, before the lighting works proceed at this pole. This is flagged notwithstanding that this report does not otherwise carry remediation recommendations, given the criticality of the airfield lighting supplied.
2. Location
| GPS (lat, long) | -37.667594, 144.844836 |
| 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 | Northern Apron DB |
| 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 | 63 |
| Supply cable schedule | |
|---|---|
| Active conductor size | 25 mm² |
| Configuration | 1x4C |
| Conductor arrangement | circular |
| Parallel sets | 1 |
| Conductor material | Copper |
| Insulation / type | PVC |
| Armour | Unarmoured |
| Installation method | Underground Enclosure |
| Conduit | 80 mm |
| Loaded circuits in conduit | — |
| Estimated depth | 0.5 m |
| Earth arrangement | Integral — 6 mm² |
| Approx. length | 5 |
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 | 3 | Major / safety (P2) | Direct-contact / earthing / labelling integrity |
| Structural & enclosure integrity | 3 | Major / safety (P2) | Enclosure & chassis mechanical integrity |
| Corrosion & protective coating | 3 | Major / safety (P2) | 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. The gated rating is RED, driven by structural / enclosure damage, an electrical-safety non-compliance and corrosion to fixings and bars (Condition Index 48.8/100). RED reflects a gate breach — a safety/structural P2 or an AS/NZS 3000 Cl 2.10 clearance non-compliance — that cannot be averaged away.
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 | Structural | Safe-T chassis — structural chassis integrity concern | P2 |
| D-02 | Structural | Pole filler missing | P2 |
| D-03 | Corrosion | Minor pitting to enclosure / structure | P3 |
| D-04 | Corrosion | Minor surface rust to fixings and bars | P4 |
| D-05 | Electrical | Obsolete circuit protection: Terasaki Safe-T MCB/RCD (SRCB2030) and control CBs (TH-5-SE) are no longer manufactured or available. The chassis is obsolete and its circuit protection can no longer be purchased, so the board cannot be re-protected or maintained for the new works. Full board replacement by APAM is required to facilitate the electrical installation and must be completed before the works proceed at this pole. | P2 |
6. Suitability for the LED works
Suitability for LED worksREPLACE BOARD FIRST
The new LED floodlight load and driver footprint are materially smaller than the legacy HID gear removed, and the existing 3-phase supply, 25 mm² feed and cabinet isolation are adequate for the new works. This conclusion is universal across the fleet and is independent of condition. It does not apply to this board in its present form: the existing board is to be replaced by APAM before the works proceed at this pole, and the new works are to be installed in the replacement board.
7. Photographic evidence
15 site photographs. Frames outlined in orange are keyed to a priority defect (fire, structural, access or ingress evidence).
