Final answer:
The subject of this question is grounding and bonding equipment in electrical engineering. The question asks about the methods that are not permitted for the connection of grounding and bonding equipment.
Step-by-step explanation:
In the context of electrical engineering, the subject of the question is grounding and bonding equipment. Grounding refers to the process of connecting a conductor to the earth with a good conductor in order to fix it at zero volts. Bonding, on the other hand, refers to the connection of conductive parts to ensure electrical continuity and to prevent the buildup of dangerous voltages.
In the National Electrical Code (NEC), section 250.8(B) specifies the methods that are not permitted for the connection of grounding and bonding equipment. These methods are deemed unsafe and can lead to electrical hazards. Examples of methods not permitted include using non-conductive cement or buried metal objects as grounding electrodes.
It's important to follow the NEC guidelines for grounding and bonding equipment to ensure electrical safety and to prevent electrical shocks or other hazards.