Structural reliability of electrical panels installed in naval vessels is of critical importance from the structural performance viewpoint. The electrical panels may be exposed to vibration and fatigue loadings from internal and external sources as well as wave loadings that result into fatigue crack and fracture due to the decrease of fatigue strength. In this regard, electrical outfitting equipments on naval vessels are required to comply with capabilities against vibration and shock tests, normally tested according to Military Standard. This study introduces the effect of post welding treatment, such as toe grinding as well as post welding heat treatment (PWHT), are examined through a series of fatigue and impact tests according to military standards. On the other hand, the use of elastic mounts that are capable of isolating and mitigating shock and vibration toward electrical panels are investigated. Both experimental and numerical results are presented based on the analysis according to military standards.