When an MEP engineer or EPC procurement team writes a cable tray specification for an Indonesian project, two distinct regulatory frameworks apply simultaneously — and conflating them is one of the most common sources of under-specified cable management BOQs. PUIL 2011 governs installation. NEMA VE 1 governs product load performance. Neither replaces the other.
This guide maps the two-layer standard framework for cable tray in Indonesia, clarifies what each standard tests (and what each leaves undefined), and shows how to reference Sucofindo-tested NEMA VE 1 reports in a project specification or RFQ package.
The Two-Layer Framework
Layer 1 — SNI 0225:2011 (PUIL 2011): Installation Standard
SNI 0225:2011 — known as PUIL 2011 (Persyaratan Umum Instalasi Listrik 2011, General Requirements for Electrical Installations 2011) — is Indonesia’s national adoption of IEC 60364. Published by BSN (Badan Standardisasi Nasional), it is mandatory for any building requiring a construction permit (IMB) under prevailing Kemen PUPR building regulations.
Part 52 of PUIL 2011 governs wiring systems, including cable tray. Key provisions relevant to cable tray design:
- PUIL 2011 §52.1 (Types of wiring systems) — designates cable tray as a valid installation method.
- PUIL 2011 §52.2 (Selection and erection in relation to external influences) — temperature, water ingress, corrosion exposure, mechanical stress; the environmental suitability criteria a cable tray installation must meet.
- PUIL 2011 §52.3 (Current-carrying capacity) — derating factors for cables installed in cable trays, based on cable count and ambient temperature.
For any permitted building project, the MEP consultant must reference PUIL 2011 in electrical installation drawings. This is the regulatory minimum — and the only layer of SNI that explicitly addresses cable tray.
Layer 2 — Product Performance: Where PUIL Is Silent
PUIL 2011 does not define cable tray load classes.
The standard governs how cable trays must be installed — not how strong the product itself must be. There is no uniformly distributed load (UDL) table, no load class system, and no deflection test protocol for cable tray products anywhere in PUIL 2011.
This is not a deficiency of PUIL — installation standards are not the domain of product performance specifications. But for the MEP engineer writing a BOQ, the consequence is clear: a specification that references only “per PUIL 2011” leaves structural load compliance entirely undefined. The product could be Class 1 or Class 8C — PUIL does not ask.
There is no standalone SNI product standard equivalent to NEMA VE 1 for cable tray. BSN has not established a dedicated product standard that classifies cable trays by UDL capacity. IEC 61537 (the international cable tray systems standard) has not been confirmed as adopted as a numbered SNI at the time of writing. If BSN has adopted IEC 61537 since publication, cite the SNI number directly; if not, NEMA VE 1 remains the applicable product performance reference.
What NEMA VE 1 Tests — and What SNI Does Not
NEMA VE 1-2017 (Metal Cable Tray Systems) is a product performance standard from the National Electrical Manufacturers Association. It classifies cable trays by maximum uniformly distributed load (UDL) at a defined span — a direct measure of structural capacity under real cable loading conditions.
The test methodology: a measured distributed load is applied uniformly across the cable tray span. Deflection at midspan is recorded. The maximum load at the permissible deflection limit defines the load class. Higher class = higher UDL capacity per span. The class system provides a directly comparable, testable number that a specifier can write into a BOQ and an auditor can verify against the test report.
NEMA VE 1 also specifies dimensional tolerances, material options (steel, aluminium, stainless steel), and finish/coating categories (hot-dip galvanised, zinc-plated, powder coat, stainless steel, aluminium). None of these are addressed as product specifications in PUIL 2011.
Why NEMA VE 1 is the applicable product reference in Indonesia: Sucofindo / IDSurvey — government-linked testing and certification bodies — are capable of conducting NEMA VE 1 methodology tests within Indonesia. A Sucofindo report referencing NEMA VE 1-2017 is independently verifiable, citable in BOQ and RFQ documents, and accepted as third-party performance evidence by MEP consultancies and EPC procurement teams operating in Indonesia.
Comparison Table: NEMA VE 1-2017 vs SNI 0225:2011 (PUIL 2011)
| Parameter | NEMA VE 1-2017 | SNI 0225:2011 (PUIL 2011) | Implication for Specifiers |
|---|---|---|---|
| Standard purpose | Product performance standard | Installation practice standard | Both apply; different regulatory layers — neither replaces the other |
| Load classification | Classes 1–8C (UDL test, kg/span) | Not addressed | NEMA VE 1 class is the de facto load specification tool in Indonesia |
| Test method | UDL + midspan deflection limit | Not specified | Sucofindo/IDSurvey can test to NEMA VE 1 methodology in-country |
| Dimensional tolerances | Yes, per NEMA VE 1 tables | Not in PUIL | Reference product dim tables separately in BOQ |
| Finish/coating options | Defines options: HDG, zinc-plated, powder coat, stainless steel, aluminium | Material standard reference only | Coating spec must be named explicitly in BOQ — do not leave as “manufacturer standard” |
| Testing body | NEMA member labs (US); Sucofindo/IDSurvey (Indonesia) | BSN / LSPro | Sucofindo report is the in-country verification path |
| Mandatory vs voluntary | Voluntary product standard | Mandatory for building permits (IMB) | Specifiers need both: PUIL compliance for installation + NEMA load class evidence for product performance |
Tested Performance: Sucofindo Reports for PT Metalindo Tosan Surya
PT Metalindo Tosan Surya commissioned Sucofindo / IDSurvey to test two principal cable management SKUs against NEMA VE 1-2017 / CSA C22.2. Results, dated 18 July 2025:
| SKU | Dimensions | NEMA VE 1 Class | Max UDL | Test Span | Report No. |
|---|---|---|---|---|---|
| SLU (Cable Ladder) | W600 × H100 | Class 8C | 1,340 kg/span | 2,400 mm | E26929/FNBPAS |
| TRU (Cable Tray) | W300 × H100 | Class 8B | 420 kg/span | 2,400 mm | E26933/FNBPAS |
Both reports are available on request and can be attached to RFQ packages or incorporated by reference in design specifications. Reports are independently verifiable through Sucofindo.
BOQ reference language — cable tray (TRU):
Cable tray: steel, dry powder-coated (minimum 60 µm, ISO 12944 C3–C5M), NEMA VE 1-2017 Class 8B minimum at [project span] mm span, demonstrated by independent third-party test report. PT Metalindo Tosan Surya reference: Sucofindo E26933/FNBPAS (18 July 2025) or approved equivalent with equivalent test evidence.
BOQ reference language — cable ladder (SLU) for high-density data centre runs:
Cable ladder: steel, dry powder-coated (minimum 60 µm), NEMA VE 1-2017 Class 8C at 2,400 mm span, demonstrated by Sucofindo/IDSurvey test report. Reference: Sucofindo E26929/FNBPAS (18 July 2025).
Both load figures represent tested results at the stated span — not manufacturer claims. The deflection criterion and UDL test methodology follow NEMA VE 1-2017 Section 6 as applied by Sucofindo.
Regulatory Bodies and Certification Routes in Indonesia
| Body | Role | Relevance to Cable Tray |
|---|---|---|
| BSN (Badan Standardisasi Nasional) | Issues SNI standards; national standardisation policy | Publisher of PUIL 2011 / SNI 0225:2011 |
| KAN (Komite Akreditasi Nasional) | Accredits LSPro bodies and testing laboratories | Accreditation authority behind any SNI product mark |
| LSPro (Lembaga Sertifikasi Produk) | Issues SNI product marks on qualifying products | The formal route to an SNI product mark for cable tray |
| Sucofindo / IDSurvey | Government-linked testing and certification bodies | Can test to NEMA VE 1; issues verifiable performance reports cited in BOQs |
| Kemen PUPR | Ministry of Public Works; building regulations | References PUIL 2011 compliance in building permit requirements |
| DJK (Dirjen Ketenagalistrikan), ESDM | Electrical installation safety oversight | Safety regulation for industrial and utility installations |
For Singapore-based DC contractors procuring for Indonesian builds: the relevant compliance path is PUIL 2011 (installation, mandatory via IMB) + NEMA VE 1-tested product load class (performance evidence, requested via Sucofindo report). Both should be in the technical specification appendix of any EPC subcontract for cable management. See also our guide on specifying cable tray for hyperscale data centres in Indonesia and cable tray load calculation methodology.
What This Framework Does Not Cover: Technical Boundaries
PUIL 2011 is silent on cable tray load class. This is a documented factual gap in the standard — not an interpretation. A BOQ that specifies only “per PUIL 2011” leaves the structural capacity of the cable tray undefined and unverifiable. Load class must be specified separately, referenced against a product performance standard and a test report.
C5-M powder coat is not a universal solution for chemical-aggressive environments. PT Metalindo Tosan Surya’s Jotun dry powder coating is tested to ISO 12944 C3–C5M (industrial atmospheric) and passes ISO 11507 QUV accelerated weathering. This covers the large majority of industrial, commercial, and data centre environments in Indonesia. However, process environments with active chemical exposure — chlor-alkali handling, sulphuric acid atmospheres, fluorine-bearing gases — require a custom finish specification beyond standard C5-M powder coat. Hot-dip galvanised alone is not a universal substitute in these environments. See the full coating comparison at galvanised vs Jotun powder coating or contact PT Metalindo Tosan Surya for chemical-aggressive environment advisory. For oil & gas and heavy industrial applications, consult METOSU engineering before finalising the finish specification.
SNI product mark (LSPro / tanda SNI) — editorial transparency: As of publication, PT Metalindo Tosan Surya has not confirmed LSPro product-mark certification status for its cable tray range. The performance evidence we publish is the NEMA VE 1 test report from Sucofindo (E26929/FNBPAS, E26933/FNBPAS) — a third-party performance test that directly measures load class, not a formal conformity mark. If operations confirms a current LSPro certificate number before publish, this paragraph will be updated to cite it directly.
Summary for Project Specifiers
A complete cable tray specification for an Indonesian project requires three elements — not one:
| Element | Reference |
|---|---|
| Installation compliance | SNI 0225:2011 (PUIL 2011), Part 52, wiring systems |
| Product load class | NEMA VE 1-2017; Sucofindo reports E26929/FNBPAS (SLU) / E26933/FNBPAS (TRU) |
| Coating specification | ISO 12944 C3–C5M; ISO 11507 QUV (accelerated weathering) |
Any specification that includes only one or two of these elements is incomplete for a project audit.
To receive Sucofindo test reports E26929/FNBPAS and E26933/FNBPAS as project attachments, contact the METOSU technical team or email marketing@metosu.com.
