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Dedication

I would like to take this moment to thank God for giving me the opportunity and skill to help others.

Electric Shock

Death and/or severe injury can occur

whenever voltage pushes electrons

through the human body, particularly

through the heart.

Electric Shock

The hazard of death and/or severe

electric shock can occur whenever

voltage exceeds 30V in a dry location

or 15V in a wet location.

Electric Shock

The severity of electric shock is

dependant on the path through the

body it follows and the magnitude of

the current flow.

Electric Shock

Current magnitude is dependent upon

the contact voltage and the

resistance of the path it follows

through the body – I = E/R.

Effective Ground-Fault Current

Path

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Grounding does not reduce ground-

fault voltage to a safe value.

Why do we drive ground rods at

poles?

Grounding and the NEC

The purpose of this Code

is the practical

safeguarding of persons

and property from

hazards arising from the

use of electricity.

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System Grounding

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Equipment Grounding

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Equipment Grounding

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Bonding Electrically Conductive

Materials

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Effective Ground-Fault Current

Path

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QUESTION & ANSWER SESSION