In what circumstances will a plaintiff bring a claim against a company for negligence in the case of a worker killed in a workplace explosion?

In Brown v. West Riverside Coal Co., 143 Iowa, 662, 120 N.W. 732, 28 L.R.A. (N.S.) 1260, the plaintiff charged the defendant with negligence in failing to provide the deceased with a safe [199 F. 383.] place in which to work, in storing and keeping powder, dynamite, and caps in a building which was the only place provided for the workmen to deposit their tools, clothing, and lunches, and in bringing into said shanty where such explosives were kept a telephone connected with wires upon which electric currents were admitted, or liable to be conducted, without due regard to the danger of such wires becoming overcharged and causing an explosion, such as did in fact result.