(a) Arc strikes from poor earthing, which are shown in Fig. 10, from a rather precarious connection to a
main structural member. The electrical discontinuity also leads to poor welding stability and increased
defect risk.
(b) Poor illumination leads to risk of accidental arc strikes and inability to carry out efficient weld cleaning
and inspection, all of which lead to reduced quality.
(c) If preheating equipment is not readily available, welders will be encouraged to ignore specified
requirements.