- IP ratings are defined by IEC 60529, adopted in India as IS/IEC 60529.
- First digit = solids and dust (6 = dust-tight). Second digit = water.
- IPX5 test: 12.5 litres per minute through a 6.3 mm nozzle from 2.5 to 3 m.
- IPX6 test: 100 litres per minute through a 12.5 mm nozzle from 2.5 to 3 m.
- IPX7 test: 30 minutes with the lowest point 1 m under water.
- IK ratings (IEC 62262) measure impact resistance; IK08 withstands a 5 joule impact.
What an IP rating actually tells you
IP stands for Ingress Protection. It is a two-digit code from IEC 60529 that says how well an enclosure keeps things out. The first digit is for solid objects and dust, from 0 to 6. The second is for water, from 0 to 8.
For street lighting, you will almost always want the first digit to be 6, which means fully dust-tight. The real choice is the second digit.
| Rating | Dust | Water | Test in short | Where it fits |
|---|---|---|---|---|
| IP44 | Objects over 1 mm | Splashing from any direction | Oscillating spray | Covered verandas, not open streets |
| IP65 | Dust-tight | Water jets | 12.5 l/min, 6.3 mm nozzle, 2.5 to 3 m | Standard outdoor use, inland cities |
| IP66 | Dust-tight | Powerful water jets | 100 l/min, 12.5 mm nozzle, 2.5 to 3 m | Coast, heavy rain belts, water edges |
| IP67 | Dust-tight | Temporary immersion | 1 m depth, 30 minutes | Base boxes in flood-prone low spots |
| IP68 | Dust-tight | Continuous immersion | Conditions set by maker, harsher than IP67 | Underwater and in-ground fittings |
What the rating covers, and what it does not
On a decorative pole the IP rating applies to the electrical enclosures: the luminaire housing, the driver compartment and the junction box at the base. The steel shaft has no IP rating. Its protection comes from galvanizing and paint, which are covered by different standards such as IS 4759.
So a pole can have an IP66 luminaire and still rust at the base if the galvanizing is thin. Treat the two specifications separately.
Which rating for which part of India?
| Site | Minimum | Our recommendation | Why |
|---|---|---|---|
| Inland Maharashtra (Nashik, Pune, Aurangabad, Nagpur), Deccan plateau | IP65 | IP65 (IP66 for low-lying spots) | Moderate monsoon, dust in summer |
| Konkan coast, Goa, coastal Karnataka, Kerala | IP66 | IP66 | Very heavy rain, salt air |
| Mumbai and other coastal metros | IP66 | IP66, stainless fasteners | Salt, humidity, high-pressure road washing |
| Riverfront, ghat, lakefront | IP66 | IP66 luminaire; IP66/IP67 base box if water can rise | Spray, occasional flooding |
| Known flood-prone underpasses and low roads | IP67 for base enclosures | Raise the junction box height as well | Standing water |
Don't forget IK: impact resistance
Street fittings get hit by cricket balls, stones and ladders. The IK code from IEC 62262 rates this.
| IK rating | Impact energy | Roughly equal to |
|---|---|---|
| IK07 | 2 joules | 500 g mass dropped from 40 cm |
| IK08 | 5 joules | 1.7 kg mass dropped from 30 cm |
| IK09 | 10 joules | 5 kg mass dropped from 20 cm |
| IK10 | 20 joules | 5 kg mass dropped from 40 cm |
For fittings within reach of people, such as park lanterns and bollards, ask for IK08 or higher. For fittings at 6 m and above, IK07 or IK08 is usually enough.
Why IP66 fittings still fail in the monsoon
Nearly every ‘failed’ IP66 fitting we have opened after a monsoon had an installation problem, not a product one. The usual culprits:
- Cable gland not tightened or the wrong gland size for the cable, leaving a gap.
- Gasket damaged or missing after someone opened the junction box door.
- Cable entering from above with no drip loop, so water runs straight into the gland.
- Non-rated joints: tape joints or cheap connectors used where a sealed connector was specified.
- Condensation: warm day, cold night, sealed box, no breather valve. Water forms inside.
A 10-minute check at installation, with photos of each gland and gasket, saves a lot of complaint calls in July.
How to verify an IP claim
- Ask for the test report from an accredited laboratory (NABL in India), not just a catalogue line.
- Check the report names IEC 60529 or IS/IEC 60529 and the exact code tested.
- Check which part was tested: luminaire, driver box, or junction box. They are separate.
- Match the model number on the report to the model you are buying.
- For road luminaires, also ask for compliance with IS 10322 (Part 5/Section 3).
References
- IEC 60529 — Degrees of Protection Provided by Enclosures (IP Code); Indian adoption IS/IEC 60529 — International Electrotechnical Commission / BIS
- IEC 62262 — Degrees of Protection Against External Mechanical Impacts (IK Code) — International Electrotechnical Commission
- IS 10322 (Part 5/Section 3) — Luminaires for Road and Street Lighting — Bureau of Indian Standards
- IS 4759 — Hot-Dip Zinc Coatings on Structural Steel and Other Allied Products — Bureau of Indian Standards
Frequently Asked Questions
Is IP65 enough for Indian monsoon conditions?
For most inland cities such as Nashik, Pune, Nagpur and Bengaluru, yes. For the Konkan coast, Mumbai, Kerala, coastal Karnataka and any riverfront or lakefront site, choose IP66.
Does the pole shaft have an IP rating?
No. The IP rating applies to the luminaire and electrical enclosures. The shaft's weather protection comes from galvanizing and paint.
Is IP67 better than IP66?
Not in every way. IP67 is tested for temporary immersion, IP66 for powerful water jets. A product rated only IP67 has not necessarily passed the jet test. For both, ask for a dual rating such as IP66/IP67.
Why do IP66 fittings still get water inside?
Usually installation: loose or wrong-size cable glands, damaged gaskets, cable entering from above without a drip loop, taped joints, or condensation with no breather.
IK08 का क्या मतलब है?
IK08 का मतलब है कि फिटिंग 5 जूल का झटका सह सकती है, यानी लगभग 1.7 किलो का वज़न 30 सेमी ऊपर से गिरने जितना। पार्क और रास्तों की नीची लाइटों के लिए यह सही है।
IP रेटिंगचा दाखला कसा तपासावा?
NABL मान्यताप्राप्त लॅबचा चाचणी अहवाल मागा. त्यात IEC 60529 चा उल्लेख, नेमका कोड आणि तुम्ही घेत असलेल्या मॉडेलचा नंबर जुळतो का ते पाहा.
