Final answer:
Technician A is correct when claiming that to check for voltage, the test light's clamp should be connected to ground. Technician B is incorrect; to check for ground, the clamp should be connected to the circuit point being tested for grounding, not to power.
Step-by-step explanation:
In the context of electrical systems, grounding refers to the process by which a conductor is connected to the earth with a good conductor, establishing a low-resistance path to ensure it is at zero volts. When using a test light to check for available voltage, Technician A is correct. The test light's clamp should indeed be connected to ground when checking for voltage, forming a complete circuit if voltage is present. The light will illuminate indicating the presence of voltage.
Regarding Technician B's statement, when checking for an effective ground, the clamp should not be connected to power, but rather to the part of the circuit that should be grounded. If the grounding is effective, the test light will not illuminate as it reveals a path of zero volts. This confirms that the conductor at the test point is correctly bonded to ground.