Codes and Standards
2. Following the Guidelines
Now, there isn't a single, universally recognized "code" that specifically states "25 ohms or less" for every application. What is important is understanding that different industries and applications have their own standards and guidelines. These standards often specify acceptable resistance levels for various connections, grounding systems, and signal paths, and often they fall well within our target range. For example, grounding systems in electrical installations often aim for very low resistance to ensure safety.
So, what does this look like in the real world? Well, picture an electrician diligently measuring the grounding resistance of a building's electrical system. They're using specialized equipment to ensure that the resistance is low enough to provide a safe path for fault currents in case of a short circuit. This prevents shocks and fires, and that's a pretty big deal!
The "code" isn't a single document but rather a collection of industry best practices, regulatory requirements, and manufacturer specifications. Electrical codes, like those from the National Electrical Code (NEC) in the US, and standards from organizations like IEEE (Institute of Electrical and Electronics Engineers), offer guidance on achieving safe and effective grounding and bonding, implicitly requiring low resistance connections. They might not say "25 ohms" verbatim for every scenario, but the underlying principle is the same: keep resistance low for optimal performance and safety.
Don't just take my word for it, dig into the relevant standards for your specific application. Whether you're working on automotive electronics, telecommunications equipment, or industrial machinery, there are likely established guidelines for acceptable resistance levels. These guidelines are your roadmap to success, ensuring your designs are safe, reliable, and compliant.
