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Product Specifications:
| Item | Locking Plug |
| Amps | 20A |
| Blade Material | Copper Alloy |
| Body Material | Nylon |
| Connection Orientation | Straight |
| For Maximum Cable Diameter | 1.15" |
| For Minimum Cable Diameter | 0.35" |
| Grade | Federal Specification |
| Grounding | Grounded |
| Housing Color | Black, White |
| Ip Rating | IP20 |
| Market | Industrial |
| Max. Operating Temp. | 75°C |
| Max. Wire Size | 8 AWG |
| Min. Operating Temp. | -40°C |
| Min. Wire Size | 14 AWG |
| Nema Configuration | L22-20 |
| Nema Plug Configuration | L22-20P |
| Number Of Blades | 5 |
| Number Of Poles | 4 |
| Number Of Wires | 5 |
| Phase | 3.0 |
| Polarized | Yes |
| Product Datasheet | hubbell-hbl2521st.pdf |
| Resistance Properties | Chemical Resistant, Impact Resistant |
| Series | EDGECONNECT™ Series |
| Shrouded | No |
| Ul 94 Flammability Rating | HB |
| Voltage | 277/480V AC |
| Voltage Rating | 277/480V AC |
| Wire Connection Type | Spring Clamp Terminals |
| Wiring Style | Standard |
Shipping Info:
| Ship weight (kg) | 0.14 |
| Ship height (cm) | 2.54 |
| Ship length (cm) | 2.54 |
| Ship width (cm) | 2.54 |
| Country of Origin | CN |
Documentation:
Product Variants
| Product | Model | Phase | Wire Connection Type | Wiring Style | Number Of Poles | Number Of Blades | Housing Color | Ip Rating | Nema Configuration | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
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HBL2411ST | Single | Spring Clamp Terminals | Standard | 3 | 4 | Black, White | IP20 | L14-20 | €73.53 | |
![]() |
HBL2711ST | 3.0 | Spring Clamp Terminals | Standard | 3 | 4 | Black, White | IP20 | L14-30 | €110.12 | |
![]() |
HBL2421ST | 3.0 | Spring Clamp Terminals | Edgeconnect | 3 | 4 | Black, White | IP20 | L15-20 | €78.60 | |
![]() |
HBL2721ST | 3.0 | Spring Clamp Terminals | Standard | 3 | 4 | Black, White | IP20 | L15-30 | €100.92 | |
![]() |
HBL2731ST | 3.0 | Spring Clamp Terminals | Standard | 3 | 4 | Black, White | IP20 | L16-30 | €113.75 | |
![]() |
HBL2821ST | 3.0 | Spring Clamp Terminals | Edgeconnect | 4 | 5 | Black, White | IP20 | L22-30 | €138.41 | |
![]() |
HBL2311ST | Single | Spring Clamp Terminals | Standard | 2 | 3 | Black, White | IP20 | L5-20 | €58.65 |
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HUBBELL HBL2521ST Locking Plug, L22-20P, 277/480V AC, 20 A, 4 Poles, Black/White, Spring Clamp Terminals
€80.59 /unit







