The insurance provides cover for the properties insured against the risk of accidental loss or damage from causes such as defects in casting and material, faulty design, faults at workshop or in erection, bad workmanship, lack of skill, carelessness, shortage of water in a boiler, physical explosion, short circuiting, storm or from any other cause other than that excluded.  These risks are covered whilst the machinery is working or at rest or being dismantled, moved or re-erected for the purpose of cleaning, inspection, repair or installation.