When it comes to electrical safety, the type of lockout padlock you use matters. Both non-conductive nylon shank and chrome-plated steel shank padlocks — are available and each designed for specific situations.
So what’s the difference, and when should you use one over the other?
Understanding the Difference
Non-Conductive Nylon Shank Padlocks
- Made from reinforced nylon, these padlocks are non-conductive, helping prevent electrical current from passing through.
- Ideal for locking out exposed live parts, such as switchboards or open electrical panels.
- Best practice in any environment where there’s a risk of arc flash or electric shock.
Chrome-Plated Steel Shank Padlocks
- Durable and corrosion-resistant, steel shanks are conductive and should only be used where live parts are not exposed.
- Perfect for mechanical isolations, non-electrical lockouts, or situations where the electrical hazard is enclosed and or fully isolated.
- Provides a strong, tamper-resistant option in rugged environments.
When to Use Each Type
| Application | Best Padlock Type | Why |
| Arc flash zones or confined switchroom spaces | Nylon Shank | Non-conductive for added protection |
| Exposed live electrical parts (e.g. switchboards) | Nylon Shank | Reduces risk of shock or arc flash |
| Non-exposed electrical isolation (e.g. locked cabinet with internal live components) | Steel Shank | Safe if parts are fully enclosed |
| Mechanical isolation (e.g. valve or lever) | Steel Shank | Strong and resistant to tampering |
Compliance Note
Under AS/NZS 4836:2023, tools and devices used near electrical installations must not introduce additional risk. While the standard doesn’t name padlock materials, using non-conductive options for exposed electrical work is considered best practice and supports safer isolation procedures.
Don’t Forget: Padlock Options Exist for Every Setup
Sometimes standard padlocks won’t fit awkward or tight lockout points. Other options available in the market are:
- Longer shanks – for hard-to-reach points
- Wire shanks – for flexibility around tight bends
- Thinner and shorter shanks – for compact devices or smaller isolators
If you’re unsure what will fit best, our team can recommend a padlock that suits your environment and complies with your LOTO procedures.
Final Word
Both nylon and steel shank padlocks have a place in lockout/tagout systems. The key is knowing when to use which one:
- Nylon Shank: Use where live parts may be exposed or where electrical contact is possible
- Steel Shank: Use where live parts are enclosed, or for mechanical and general isolations