Question

The best grounding method when arc welding is to connect the welding machine grounding cable to

Answer 1

The material you are welding other wise an arc will not be created 

Answer 2

Answer:

What it is you are welding

Explanation:

If vertical welding, place above weld as a general rule.

Clean the metal you place the clamp on.

When connecting clamp, most machines work better when the cable is facing up unless stated otherwise.

Never ground on a stool in which you intend to sit.

Ground as close to the weld as possible.

Never put stinger on the ground clamp.