Knowledge Base
Resources & Guides
Everything you need to select, size, and maintain your high-voltage insulating gloves. Use these guides to ensure you have the right protection for the job.
Voltage Class Selection Guide
Choosing the right glove class starts with one question: What is the maximum voltage you will be exposed to? Match your exposure voltage to the table below. Always select a class that meets or exceeds your maximum exposure.
Quick Decision Tree
Residential / low-voltage control (≤500V)? → Class 00
Industrial 480V / secondary distribution (≤1,000V)? → Class 0
Primary distribution / pad-mount transformers (≤7,500V)? → Class 1
Distribution feeders / 15kV switchgear (≤17,000V)? → Class 2
Sub-transmission / 25kV systems (≤26,500V)? → Class 3
Transmission / 34.5kV class (≤36,000V)? → Class 4
| Class | Max AC Voltage | Max DC Voltage | Typical Applications |
|---|---|---|---|
| Class 00 | 500V | 750V | Low-voltage control circuits, residential wiring |
| Class 0 | 1,000V | 1,500V | Secondary distribution, industrial 480V systems |
| Class 1 | 7,500V | 11,250V | Primary distribution, pad-mount transformers |
| Class 2 | 17,000V | 25,500V | Distribution feeders, 15kV class switchgear |
| Class 3 | 26,500V | 39,750V | Sub-transmission lines, 25kV systems |
| Class 4 | 36,000V | 54,000V | Transmission lines, 34.5kV class systems |
Glove Sizing Chart
Proper fit is essential for both safety and dexterity. A glove that is too tight restricts movement and increases fatigue. A glove that is too loose reduces grip and tactile sensitivity.
How to Measure Your Hand
- Wrap a flexible measuring tape around the widest part of your palm (across the knuckles, excluding the thumb).
- Make a loose fist and note the circumference in inches.
- Your palm circumference in inches corresponds directly to your glove size number.
- If you are between sizes, round up to the next whole size for insulating gloves.
| Size | Palm Circumference | Middle Finger Length | Description |
|---|---|---|---|
| Size 7 | 7" (178mm) | 4.4" | Extra Small |
| Size 8 | 8" (203mm) | 4.7" | Small |
| Size 9 | 9" (229mm) | 5.0" | Medium |
| Size 10 | 10" (254mm) | 5.3" | Large |
| Size 11 | 11" (279mm) | 5.6" | Extra Large |
| Size 12 | 12" (305mm) | 5.9" | 2X Large |
Glove Kit Pairing Guide
Every rubber insulating glove should be paired with the correct leather protector. The leather protector must extend beyond the rubber glove cuff by the specified gap to prevent accidental contact with energized parts at the cuff edge.
| Rubber Glove Class | Cuff Gap Requirement | Leather Protector Type | Protector Length |
|---|---|---|---|
| Class 00 / Class 0 | 1/2" (13mm) | Low-voltage leather protectors | 11" |
| Class 1 | 1" (25mm) | Medium-voltage leather protectors | 14" |
| Class 2 | 2" (51mm) | High-voltage leather protectors | 16" |
| Class 3 | 2" (51mm) | High-voltage leather protectors | 18" |
| Class 4 | 2" (51mm) | Extra high-voltage leather protectors | 18" |
Important Note
The leather protector must always be shorter than the rubber glove so the rubber cuff extends beyond the leather. This exposed rubber cuff provides the critical insulating barrier at the wrist. Never trim or modify leather protectors. Replace protectors that are worn, stiff, or no longer fit properly over the rubber glove.
Frequently Asked Questions
Common questions about insulating gloves, testing, and compliance.
Still Have Questions?
Our team of electrical safety specialists is here to help you find the right gloves, understand compliance requirements, and keep your crew protected.