-OUT TO PREVENT ANY FORM OF ENERGY FROM ENTERING THE EQUIPMENT. THIS WOULD INCLUDE ELECTRICAL OR MECHANICAL ENERGY INTO OR FROM THE PRIME MOVER(S), PNEUMATIC ENERGY FROM THE COMPRESSOR/AIR SYSTEM. ETC. Print j Home 2 Index I Next e NATIONAL OILWELL VARCO EFTA00795785 NATIONAL OILWELL VARCO Installatio