NEMA Watertight Hubbell Twist-Lock System
Rating IP66 Suitability
Configuration
Male/Female
Voltage Amperage Wires Poles Plug Inlet Connector Receptacle Adapter
NEMA L5-20 Safety-Shroud Diagram
NEMA L5-20
125V AC 20 amps 3 Wires 2 Poles HBL2311SW HBL2315SW HBL2313SW HBL2310SW Custom
NEMA L6-20 Safety-Shroud Diagram
NEMA L6-20
250V AC 20 amps 3 Wires 2 Poles HBL2321SW HBL2325SW HBL2323SW HBL2320SW Custom
NEMA L7-20 Safety-Shroud Diagram
NEMA L7-20
277V AC 20 amps 3 Wires 2 Poles HBL2331SW HBL2335SW HBL2333SW HBL2330SW Custom
NEMA L14-20 Safety-Shroud Diagram
NEMA L14-20
125/250V AC 20 amps 4 Wires 3 Poles HBL2411SW HBL2415SW HBL2413SW HBL2410SW Custom
NEMA L15-20 Safety-Shroud Diagram
NEMA L15-20
3Ø 250V AC 20 amps 4 Wires 3 Poles HBL2421SW HBL2425SW HBL2423SW HBL2420SW Custom
NEMA L16-20 Safety-Shroud Diagram
NEMA L16-20
3Ø 480V AC 20 amps 4 Wires 3 Poles HBL2431SW HBL2435SW HBL2433SW HBL2430SW Custom
NEMA L21-20 Safety-Shroud Diagram
NEMA L21-20
3ØY 120/208V AC 20 amps 4 Wires 4 Poles HBL2511SW - HBL2513SW HBL2510SW Custom
NEMA L5-30 Safety-Shroud Diagram
NEMA L5-30
125V AC 30 amps 3 Wires 2 Poles HBL2611SW HBL2615SW HBL2613SW HBL2610SW Custom
NEMA L6-30 Safety-Shroud Diagram
NEMA L6-30
250V AC 30 amps 3 Wires 2 Poles HBL2621SW HBL2625SW HBL2623SW HBL2620SW Custom
NEMA L14-30 Safety-Shroud Diagram
NEMA L14-30
125/250V AC 30 amps 4 Wires 3 Poles HBL2711SW HBL2715SW HBL2713SW HBL2710SW Custom
NEMA L15-30 Safety-Shroud Diagram
NEMA L15-30
3Ø 250V AC 30 amps 4 Wires 3 Poles HBL2721SW HBL2725SW HBL2723SW HBL2720SW Custom
NEMA L16-30 Safety-Shroud Diagram
NEMA L16-30
3Ø 480V AC 30 amps 4 Wires 3 Poles HBL2731SW HBL2735SW HBL2733SW HBL2730SW Custom
NEMA L17-30 Safety-Shroud Diagram
NEMA L17-30
3Ø 600V AC 30 amps 4 Wires 3 Poles HBL2741SW HBL2745SW HBL2743SW HBL2740SW Custom
NEMA L21-30 Safety-Shroud Diagram
NEMA L21-30
3ØY 120/208V AC 30 amps 4 Wires 4 Poles HBL2811SW HBL2815SW HBL2813SW HBL2810SW Custom

 

NEMA Environmental Ratings

NEMA Enclosure Type Number Basic Description
1 Indoor enclosures which protect personnel from incidental contact and also protect against falling dirt.
2 Indoor enclosures which protect personnel from incidental contact, protect against falling dirt, and protect against dripping and light splashing of non-corrosive liquids.
3 Indoor/outdoor enclosures which protect personnel from incidental contact, protect against falling dirt, rain, sleet, snow, and windblown dust and protect against external ice.
3R Indoor/outdoor enclosures which protect personnel from incidental contact, protect against falling dirt, rain, sleet, and snow, and protect against external ice.
3S Indoor/outdoor enclosures which protect personnel from incidental contact, protect against falling dirt, rain, sleet, snow, and windblown dust and protects external mechanisms from ice.
4 Indoor/outdoor enclosures which protect personnel from incidental contact, protect against falling dirt, rain, sleet, snow, windblown dust, splashing water, and hose-directed water and protect against external ice.
4X Indoor/outdoor enclosures which protect personnel from incidental contact, protect against falling dirt, rain, sleet, snow, windblown dust, splashing water, hose-directed water, and corrosion and protect against external ice.
5 Indoor/outdoor enclosures which protect personnel from incidental contact, protect against falling dirt, settling airborne dust, lint, fibers, and flyings, and protect against dripping and light splashing of non-corrosive liquids.
6 Indoor/outdoor enclosures which protect personnel from incidental contact, protect against falling dirt, rain, sleet, snow, hose-directed water and temporary submersion at a limited depth, and protect against external ice.
6P Indoor/outdoor enclosures which protect personnel from incidental contact, protect against falling dirt, rain, sleet, snow, hose-directed water, corrosion, and prolonged submersion at a limited depth, and protect against external ice.
7 Indoor enclosures for use in hazardous locations classified as Class I, Division 1, Groups A, B, C, or D as defined in NFPA 70.
8 Indoor/outdoor Enclosures for use in hazardous (Classified) locations classified as Class I, Division 1, Groups A, B, C, and D as defined in NFPA 70.
9 Indoor enclosures for use in hazardous locations classified as Class II, Division 1, Groups E, F, or G as defined in NFPA 70.
10 Enclosures that meet the Mine Safety and Hestyle="width: 90px; height: auto" alth Administration requirements, 30 CFR, Part 18.
12 Indoor enclosures without knockouts which protect personnel from incidental contact, protect against falling dirt, circulating dust, lint, fibers, and flyings, dripping and light splashing of non-corrosive liquids, and light splashing and seepage of oil and non-corrosive coolants.
12K Indoor enclosures with knockouts which protect personnel from incidental contact, protect against falling dirt, circulating dust, lint, fibers, and flyings, dripping and light splashing of non-corrosive liquids, and light splashing and seepage of oil and non-corrosive coolants.
13 Indoor enclosures which protect personnel from incidental contact, protect against falling dirt, circulating dust, lint, fibers, and flyings, and spraying, splashing, and seepage of water, oil, and non-corrosive coolants.

*NEMA ratings provide "a degree of protection" (not absolute protection).

IP Rating Chart

Ingress Protection (IP) Rating
IP Number First Digit - Protection from Solids IP Number Second Digit - Protection from Liquids
0 Not protected from solids. 0 Not protected from liquids.
1 Protected against solid objects over 50 mm, e.g. accidental touch by persons hands. 1 Protection against vertically falling drops of water e.g. condensation.
2 Protected against solid objects over 12 mm, e.g. persons fingers. 2 Protection against direct sprays of water up to 15° from the vertical.
3 Protected against solid objects over 2.5 mm (tools and wires). 3 Protected against direct sprays of water up to 60° from the vertical.
4 Protected against solid objects over 1 mm (tools, wires, and small wires). 4 Protection against water sprayed from all directions - limited ingress permitted.
5 Protected against dust limited ingress (no harmful deposit). 5 Protected against low pressure jets of water from all directions - limited ingress.
6 Totally protected against dust ingress. 6 Protected against temporary flooding of water, e.g. for use on ship decks - limited ingress permitted.
7 7 Protected against the effect of immersion between 15 cm and 1 M.
8 8 Protects against long periods of immersion under pressure.
9k 9k Protected against close range high pressure, high temperature water jet.
Popular IP Ratings
IP Code First Digit - Protection from Solids Second Digit - Protection from Liquids
IP10 Protected against solid objects over 50 mm, e.g. accidental touch by persons hands. Not protected from liquids.
IP11 Protected against solid objects over 50 mm, e.g. accidental touch by persons hands. Protection against vertically falling drops of water e.g. condensation.
IP14 Protected against solid objects over 50 mm, e.g. accidental touch by persons hands. Protection against water sprayed from all directions - limited ingress permitted.
IP20 Protected against solid objects over 12 mm, e.g. persons fingers. Not protected from liquids.
IP44 Protected against solid objects over 1 mm (tools, wires, and small wires). Protection against water sprayed from all directions - limited ingress permitted.
IP52 Protected against dust limited ingress (no harmful deposit). Protection against direct sprays of water up to 15° from the vertical.
IP54 Protected against dust limited ingress (no harmful deposit). Protection against water sprayed from all directions - limited ingress permitted.
IP55 Protected against dust limited ingress (no harmful deposit). Protected against low pressure jets of water from all directions - limited ingress.
IP56 Protected against dust limited ingress (no harmful deposit). Protected against temporary flooding of water, e.g. for use on ship decks - limited ingress permitted.
IP65 Totally protected against dust ingress. Protected against low pressure jets of water from all directions - limited ingress.
IP66 Totally protected against dust ingress. Protected against temporary flooding of water, e.g. for use on ship decks - limited ingress permitted.
IP67 Totally protected against dust ingress. Protected against the effect of immersion between 15 cm and 1 M.
IP68 Totally protected against dust ingress. Protects against long periods of immersion under pressure.
Conversion of NEMA Type Numbers to IEC Class Designations
NEMA Enclosure Type Number IEC Enclosure Class Designation Description
1 IP10 General Purpose
2 IP11 Drip-proof - Indoor
3 IP54 Dust-tight, Rain-tight and Sleet (Ice) Resistant - Outdoor
3R IP14 Rainproof and Sleet (Ice) Resistant - Outdoor
3S IP44, IP54 Dust-tight, Rain-tight, and Sleet (Ice) Proof - Outdoor
4 IP56 Watertight and Dust-tight - Indoor and Outdoor
4X IP56 Watertight, Dust-tight and Corrosion-Resistant - Indoor and Outdoor
5 IP52 Superseded by Type 12 for Control Apparatus
6 IP67 Submersible, Watertight, Dust-tight and Sleet (Ice) Resistant - Indoor and Outdoor
12 IP52 Industrial Use, Dust-tight and Drip-tight - Indoor
12K IP52 Industrial Use, Dust-tight and Drip-tight with Knockouts - Indoor
13 IP54 Oil-tight and Dust-tight - Indoor