Heel Straps

Why Use Two 2-Meg Resistor Heel Grounders?

Terra highly recommends that personnel in static-sensitive areas wear two heel straps, one on each foot, to increase the integrity of the body-to-ground connection. Wearing a foot grounder on each foot ensures contact with ground via the ESD floor, even when one foot is lifted. This will more reliably remove static charges generated by human movement and more reliably protect ESDS devices. For enhanced safety from accidental contact with equipment line voltage, we recommend using foot grounders with 2 megohm resistors. Underwriters Laboratories and OSHA recommend a minimum of 1 megohm resistance-to-ground (RTG) in order to limit electrical current exposure to a maximum of 0.00025 amperes. When an operator has both feet on the floor, with each foot grounder having a 1 megohm resistor in series with the ground path, then the operator’s combined RTG, in parallel, is only .5 megohm. That is, his equivalent resistance is halved and he is at risk of exposure to 0.00050 amperes in case of contact with 250 VAC line voltage. By wearing two foot grounders, each with a 2 megohm resistor in series to ground, operators comply with the UL and OSHA recommendations at all times. The operator’s RTG is 2 megohms when one foot only is grounded, and he meets the minimum recommended resistance of 1 megohm RTG when both feet are grounded. All our foot grounders with resistors have been tested by Underwriters Laboratory and are UL listed.

Cat. # $/Each 1801-50 Login

D-Ring System Foot Grounders
Toe-Grounding System

• The most rugged, longest-lasting heel grounder in the world!
• Elastic D-ring comfort system provides maximum ankle comfort and ensures fit of cup to shoe
• Hermetically sealed external molded 2-Meg resistor is more durable than sewn-in resistors

This foot grounder combines all of our premium features in a single, high-value unit. Its cross-linked, 1.5"-wide tire-grade rubber heel cap ensures complete charge dissipation and provides two wear surfaces for greater durability and double the service life of other heel cups.

The elastic D-ring comfort system provides maximum ankle comfort and allows for flex during walking. The 30"-long nylon/polyester grounding tab with eight conductive strands is ideal for boots. Internal reinforced, nonmarring scrim layer eliminates tearing. The rugged molded exterior withstands physical shock and resistor bypass due to moisture. Sole: 1.50"W (heel), 1.25"W (toe). Shipping Weight: 0.20 lbs.

Cat. # $/Each 1801-51 Login

3-Layer Blue Non-Marring Foot Grounders
Heel-Grounding System

• D-ring fastening system provides maximum ankle comfort, ensures snug fit of cup to shoe
• Non-marring exterior is ideal for cleanroom applications
• Hermetically sealed external molded 2-Meg resistor is rugged and safe, more durable than sewn-in resistors

This heel-grounding system incorporates all of our advanced features plus a non-marring exterior that won’t scuff cleanroom floors. Its elastic D-ring comfort system flexes for more comfortable ankle motion.

The externally molded 2-Meg resistor works when wet. Three-layer blue dissipative rubber heel cup is highly abrasion resistant and ensures complete static dissipation.

Nylon/polyester gray-resistant grounding tab with eight conductive strands dissipates charge quickly and provides excellent electrical interface with worker. Sole: 1.50 wide. Shipping Weight: 0.10 lbs.

Cat. # $/Each 1801-52 Login

Elasticized Ankle Strap
Heel Grounding System

• Provides two wide-wear surfaces at an economy price
• Includes a 2-Meg flexible resistor
• 30"-long nylon/polyester grounding tab

This economy heel grounder includes advanced performance features of our premium models. Its cross-linked, tire-grade rubber provides two wear surfaces for longer service life. The elasticized hook/loop ankle strap flexes for comfortable wear and includes a non-marring interior. A 2-Meg flexible resistor is included. Shipping Weight: 0.10 lbs.