28. To remain as for direct current.
29. There must be an insulation between the starter or primary windings and the frame of not less than one megohm.
30, 31, and 32. Same as for direct current.
33. Tablet. Furnish and mount where directed a polished slate tablet having mounted thereon a 30 ampere, 250 volt, .... pole knife switch with enclosed indicating fuses and, if displacement type exhauster is furnished, an automatic starter of the “across the line” type, operated by vacuum in the separator which will stop motor when the vacuum in the separator rises 2 in. above that required to meet test conditions, and start exhauster when vacuum reaches working range.
CLASS 2
Plant for Large Office Building Having Pipe Lines of Moderate Length.
1. Same as for Class 1.
2. Omit centrifugal fan.
3 to 9. Same as for Class 1.
Omit 10 to 13.
14 and 16. Same as for Class 1.