Discussion Overview
The discussion revolves around the relationship between circuit breaker amperage ratings and RMS (root mean square) amperage, particularly in the context of household circuit breakers rated at 15A. Participants explore the implications of connecting a resistor to the circuit and the behavior of circuit breakers under different current conditions.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
Main Points Raised
- One participant questions whether the 15A rating of circuit breakers refers to total amperage or specifically to RMS amperage, considering the peak voltage in the circuit.
- Another participant provides a link to a datasheet that includes a graph showing the relationship between current and trip time, noting that a breaker may take a long time to trip at the rated current.
- Some participants express uncertainty about the implications of RMS current, with one suggesting that circuit breakers are rated based on the heating effect of current.
- There is a reiteration of the importance of understanding RMS current in the context of circuit protection devices like fuses and thermal breakers.
Areas of Agreement / Disagreement
Participants generally agree that the circuit breaker amperage is related to RMS current, but there remains uncertainty about the specifics of how this applies in practical scenarios. Multiple viewpoints exist regarding the interpretation of the datasheet and the behavior of current in the circuit.
Contextual Notes
Some participants note that the current drawn from an outlet is not constant, as it fluctuates with the AC voltage waveform, which may affect the understanding of breaker ratings.
Who May Find This Useful
This discussion may be useful for individuals interested in electrical engineering, circuit design, or those seeking to understand the operation of circuit breakers in household electrical systems.