IP protection and cable glands: enclosure, IP and gland range

Enclosure IP and the cable entry together decide whether a joint stays dust- and water-protected after assembly. A common mistake: buy an IP65 box and drill a hole without a matching gland. This guide is how to read IP and gland range from the card, not how to guess millimetres.

LBN 261-15 point 17 requires equipment to withstand the environmental conditions at the place of installation (Annex 3) — that is not “IP65 on every outdoor box”.

IP on the box holds only if lid, gaskets and entries are fitted per the manufacturer. Smooth walls (GW44218) mean you choose entries; other Gewiss GW440xx boxes include glands in the walls — check the card.

• Hensel AKM 16 — M16, 5–10 mm on the card, IP66/IP67, outdoor, grey.
• Hensel AKM 40 — M40, 19–28 mm, IP66/IP67.
• Hensel ASS 20 — card says M12, 5–13 mm, IP66/IP67, black. Confirm the thread on the datasheet — we do not “correct” a catalogue string into another thread size.
• Hensel ASS 25 — card says M12, 8–17 mm, IP66/IP67. Same rule.
• Legrand 098022 — PG11, 5–10 mm, IP68.
• Legrand 098024 — PG16, 10–14 mm, IP68.
• Legrand 381579 — ISO25, IP68; diameter range is not on this card — datasheet only.

We do not say 3×2.5 mm² cable is “always 8 mm”. Measure the cable or use its datasheet, then pick the gland. No drilling steps. Indoor IP30 boards: board bill of materials. Boxes: distribution boxes. Glands and trunking: trunking and conduit.

Sources: LBN 261-15 point 17 and Annex 3 (18 Oct 2026); IEC 60529; ranges only from the cited cards.