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

Every person to whom any permission is granted under section 239 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.