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Electric Shock Injury


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Simple Hot Tub Chemistry

  1. Hot Tub Chemistry Fundamentals

  2. Why you can't treat a portable hot tub like a Swimming Pool

  3. Total Alkalinity & pH

  4. Sanitize & Oxidize

  5. Step-by-Step Hot Tub Chemistry Checklist with dosage tables

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  7. Hot Tub Chemical Damage

Hot Tub Water Conservation


Hot Tub Electrical Safety

When you're sitting in water up to your neck...
even a small shock can kill you.


The U.S. Department of Labor, Occupational Safety & Health Administration (OSHA) describes how electrical current affects the human body:

https://www.osha.gov/SLTC/etools/construction/electrical_incidents/eleccurrent.html

Effects can range from a barely perceptible tingle to severe burns and immediate cardiac arrest. Although it is not known the exact injuries that result from any given amperage, the following table demonstrates this general relationship for a 60-cycle (household power) hand-to-foot shock of one second duration (Tip: Don't volunteer for OSHA studies...):

(This table also shows why your hot tub must be connected to a
Ground Fault Circuit Interrupter (GFCI) breaker)

Current Level (Amps)

Probable Effect on Human Body
0.001 Amps Slight tingling sensation. Still dangerous under wet conditions.
0.005 Amps Slight shock felt; not painful or disturbing. Average individual can let go. However, strong involuntary reactions to shocks in this range may lead to injuries.

A properly wired Ground Fault Circuit Interrupter (GFCI) trips at ~0.005 Amps.

0.006 to 0.016 Amps Painful shock. Begin to lose muscular control. Commonly referred to as the "freeze current" or "let-go" range.
0.017 to 0.99 Amps Extreme pain. Respiratory arrest. Severe muscular contractions. Individual cannot let go. Death is possible.
0.1 to 2.0 Amps Ventricular fibrillation (uneven, uncoordinated pumping of the heart) Muscular contraction and nerve damage begins to occur. Death is likely.
>: 2.0 Amps Cardiac arrest. Internal organ damage. Severe burns. Death is probable.
A typical household outlet can deliver 15 to 20 Amps before the breaker trips.
A typical 220 Volt hot tub can deliver 50 to 60 Amps before the breaker trips.
A GFCI protected hot tub trips at ~0.005 Amps.

 


You can't climb out of your hot tub if the water is shocking you.

Entire swimming pool electrified by short circuit.

 

 

 

 


Temecula boy suffers severe shock from aluminum patio electrified by string lighting

 


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