Laser diagnostics at the wavelength of 266 nm allow investigation of wire array Z-pinches and X-pinches at the 1 MA pulse power generator. Faraday rotation diagnostics at 266 nm is applied to study MG magnetic fields in Z-pinch plasma. Faraday diagnostics can qualitatively visualize magnetic fields in dense plasma and give additional information about the current flow even if the plasma density cannot be reconstructed with interferometry. A comparison of images from the three-channel polarimeter shows strong localized magnetic fields, revealing the path for the electric current inside the plasma. Faraday images present current switched to the trailing plasma.