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david90
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If two 55 watts light is connected to a car's 12v battery, what amp rating relay should I get? 55/12 = 4.5 * 2 = 9amps? right?
Choosing Relay for Two 55W Lights on 12V Battery
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SUMMARY
When connecting two 55W lights to a 12V battery, a relay with a minimum amp rating of 10 amps is recommended for optimal performance and safety. The calculation of 9 amps (derived from 55W/12V multiplied by 2) is accurate, but it is advisable to select a relay with a higher rating to account for potential inrush current and ensure reliability. Using a 10 amp relay provides a safety margin and prevents overheating.
PREREQUISITES- Understanding of basic electrical calculations (Ohm's Law)
- Familiarity with relay specifications and ratings
- Knowledge of automotive electrical systems
- Experience with wiring and circuit design
- Research "automotive relay selection criteria" for further insights on choosing appropriate relays.
- Learn about "inrush current" and its implications for relay ratings.
- Explore "wiring diagrams for automotive lighting" to understand proper installation techniques.
- Investigate "12V battery management systems" to enhance battery performance and longevity.
Automotive electricians, DIY enthusiasts, and anyone involved in automotive lighting installations will benefit from this discussion.
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