Type answers impact direction
Use Type I for top impact. Use Type II when side or lateral impact is a realistic jobsite hazard.
Head Protection Tool
Hard Hat Class Decoder
Decode Type I vs Type II and Class G, Class E, and Class C before you specify construction hard hats in a bulk PPE order.
Quick decoder
Choose the hard hat type and class
Use this as a purchasing starting point. The final decision should match the hazard assessment, site rules, and the label on the product.
Class answers electrical exposure
Class E and G are electrical classes. Class C is conductive and should not be used around electrical hazards.
RFQ should name both
A supplier quote should specify type, class, shell style, venting, chin strap, accessories, and label proof.
Hard hat types and classes
| Type | Meaning | Use |
|---|---|---|
| Type I | Top impact protection | General construction sites where falling objects above the worker are the main head hazard. |
| Type II | Top and lateral impact protection | Scaffolding, steel work, climbing-style helmets, tight equipment zones, and tasks where side impact is realistic. |
| Class | Meaning | Use |
|---|---|---|
| Class G | General electrical protection | Common construction baseline where limited electrical exposure may exist. ANSI testing is commonly referenced at 2,200 volts. |
| Class E | Higher electrical protection | Electrical work or sites where stronger dielectric protection is required. ANSI testing is commonly referenced at 20,000 volts. |
| Class C | Conductive, no electrical protection | Ventilated comfort where electrical exposure is controlled out. Do not use around electrical hazards. |
Construction task matrix
| Task | Starting point | Buyer note |
|---|---|---|
| General building site | Type I Class G | Most useful baseline when overhead impact is the main concern. |
| Electrical installation | Type I or Type II Class E | Avoid vented shells unless the label still confirms the required class. |
| Scaffolding or elevated work | Type II Class G or E | Side impact and chin strap retention often matter more. |
| Roadwork or equipment zones | Type I or Type II Class G | Add hi-vis, eyewear, hearing, and visibility checks to the same RFQ. |
| Hot outdoor work with no electrical exposure | Class C only if allowed | Class C improves ventilation but removes electrical protection. |
Related buying guides
Guides to finish the head protection decision
Use these pages when the decoder result needs to become a full construction PPE specification, kit, or RFQ.
Electrical classes
Class E vs G vs C Hard Hats
Understand electrical class limits before choosing head protection.
Read guideShell materialsSafety Helmet Material Guide
Compare fiberglass or FRP, ABS, and HDPE shells without treating material names as impact, electrical, or heat approvals.
Read guideShell ventilationVented vs Non-Vented Hard Hats
Assess ventilation, Class C limits and comfort against the site hazard assessment.
Read guideBrim stylesFull Brim vs Cap Style Hard Hats
Compare brim coverage and accessory compatibility before selecting a shell style.
Read guideColour planningHard Hat Color Codes
Plan role colours, visitor identification and clear colour requirements for the order.
Read guideImpact typesType 1 vs Type 2 Hard Hats
Compare Type I and Type II impact coverage alongside Class G, E and C requirements.
Read guideHead protectionHard Hat Types Guide
Compare hard hat classes, shell styles, compatible accessories and fit before ordering.
Read guideHelmet selectionSafety Helmet vs Hard Hat
Compare hard hats and helmet-style protection against hazards, retention and compatibility needs.
Read guideMining head protectionMining Safety Helmet Buyer Guide
Control helmet fit, cap-lamp interfaces, PPE compatibility, model evidence, samples, spare parts, and substitutions before a bulk order.
Read guideBulk purchasingBulk PPE Procurement
Prepare a clear RFQ, compare supplier evidence and plan repeat orders.
Read guideFAQ
Hard hat class questions
Understand impact types, electrical classes and label details before selecting head protection for your site.
What is a Class E hard hat?
A Class E hard hat is the higher electrical-insulation class used in many electrical construction specifications. Buyers should confirm the ANSI/ISEA Z89.1 marking on the shell or label and match the choice to the site hazard assessment.
What is a Class G hard hat?
A Class G hard hat is a general-use electrical class. It is often used as a construction baseline where impact protection is needed and limited electrical exposure may exist.
What class of hard hat does not provide electrical protection?
Class C hard hats do not provide electrical protection. They are conductive and usually chosen for ventilation or comfort only where electrical exposure has been controlled out.
What is the difference between Type I and Type II hard hats?
Type I hard hats are intended for top impact protection. Type II hard hats add lateral impact protection, which can be useful for scaffolding, climbing-style helmets, steel work, and tight construction zones.
Can I buy one hard hat class for every construction worker?
Sometimes, but it is safer to map head protection by task. Electrical crews, scaffold crews, equipment zones, visitors, and general labor may need different type, class, venting, chin strap, and accessory decisions.
Add the selected hard hat type and class to your PPE RFQ.
Include Type I or Type II, Class G/E/C, shell style, venting, chin strap, accessory compatibility, label photos, and replacement suspension needs.