Precautions for public safety to be taken by persons to whom permission is granted

under section 322.— Every person to whom any permission is granted under section 322 shall, at his own expense, cause the place where the soil or pavement has been opened or broken up or where he has deposited building materials or set-up any scaffold, erection or other thing, to be properly fenced and guarded, and in all cases in which the same is necessary to prevent accidents, shall cause such place to be well lighted during the night.