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Relevant Standards:
NEC – Article 680
• Section 680.2 - 23 total definitions (be familiar)
• Article 100 Definitions also apply
• LOW VOLTAGE CONTACT LIMIT - A voltage
not exceeding:
 15 volts (RMS) for sinusoidal AC
 21.2 volts peak for nonsinusoidal AC
 30 volts for continuous DC
 12.4 volts peak for DC that is interrupted at a rate of 10
to 200 Hz
• Permanent: > 42 in. or all indoor pools
• Storable: < 42 in. or all pools nonmetallic,
molded polymeric walls or inflatable fabric walls
16
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