Which statement about blue cables is true?

• A. Blue cables may have an intermediate voltage up to 12 volts
• B. Blue cables may have an intermediate voltage up to 36 volts
• C. Blue cables may have an intermediate voltage up to 65 volts
• D. Blue cables may have an intermediate voltage up to 240 volts

Answer: (B)

Blue cables are used to signal an intermediate voltage level in many safety and electrical training contexts. The up-to-36-volt limit reflects a range where circuits are considered safer to handle and can use simpler insulation and connectors than higher-voltage systems, making it a common boundary for control and instrumentation wiring. Staying at or below 36 V reduces the risk of electric shock and arcing in typical environments while still supporting practical functionality. The other limits exceed what this color-coding scheme typically designates as intermediate voltage, requiring stricter protections and different labeling. So, the statement that blue cables may have an intermediate voltage up to 36 volts aligns with how this color coding is used in the material.