Document a4E0DDDJnN3Mn16gqwXaZbEVy

fN-JO ,**CC 950920 Monsanto J. A. GlassFKOm (NamC ft LOCATION) T subject BEFEREnCE November 6, 1975 GROUNDING ELECTRICAL EQUIPMENT IN OFFICE AREAS TO B. E. Kullerd J. S. McCurley cc A. J. Bolton J. M. Gatewood F. E. Grissom R. L. Maute J. L. Rasmussen Ray Rosenberg Leonard Schwab I am planning to propose that the following statement of policy be reviewed by SHAC and adopted by the Plant Manager's Safety Board for the Texas City site: "Office type equipment need not be grounded unless it is: (a) Operated at more than 150 volts to ground. (b) A refrigerator, freezer, water cooler, or air conditioner. (c) Coffee pot within reach of a sink, water pipe, or other grounded conductor. (d) Portable, hand-held, motor-operated tool or appliance of the following types: drills, wet scrubbers, sanders, and saws. (e) Cord- and plug-connected appliances used in damp or wet locations, or by persons standing on the ground or on metal floors. (f) Portable tools which are likely to be used in wet and conductive locations." I believe that the added protection to be gained by the installation of ground fault interrupters on all office circuits does not justify the expense of such installations. I would appreciate your comments on the above proposal. gk SC 003099 J. A. Glass LAM004549 sc 003100 LAM004550 IN-10 MCC ''50920 Monsanto FROM IN/.** & LOCATIONI AilB. E. Kullerd - Texas City ( subject REFERENCE September 5, 1975 Grounding Electrical Equipment In Office Area cc F. E. Grissom R. Rosenberg TO J. A. Glass The statement in your memo of September 2 is correct and entirely adequate. It is interesting to note that our Procedure Bullerin P-0127 (which was written years before the OSHA directive 100-9) states approxi mately the same thing. There still remains the problem of receptables in office areas which may be used infrequently by maintenance workers for drill motors, portable saws, etc. It is not possible to predetermine which receptables they will need to use. We can install some grounded receptacles in hallways (for example) which maintenance can use with, if needed, Tong extension cords. An alternative to this is to provide the maintenance worker with a portable ground fault interrupter. This method is not recognized by the National ElectricaTCode (and presumably not by OSHA) as a substitute for the grounding requirement. I consider a functioning GFI to be safer than grounding. The decision on this matter should be made at a meeting with maintenance present. r ; ^ * B. E. Kullerd SC 003101 LAM004551 Monsanto J. A. GlassFROM (NAMC 4 COCArON) September 2, 1975 ' ee WWno GROUNDING ELECTRICAL EQUIPMENT IN OFFICE AREAS TO B. E. Kullerd Ray Rosenberg The SHAC committee requested me to ask you to prepare a brief statement for the minutes of the Thursday, September k, meeting which states the location policy regarding grounding of usual office area electrical equipmen t. I have tried to do this in the following statement: 'Office type equipment need not be grounded unless it is: r (a) r (b) (C) r V) (c) V Operated at more than 150 volts to ground. A refrigerator, freezer,J(,or $Tr conditioner. poizjf u/fttr/*7 nst&a/-/ s>n ^ Portable, hand-held, motor-operated tool or applia of the following types: drills, wet scrubbers, sanders, and saws. c Cord- and plug-connected appliances used in damp or wet ' locations, or by persons ssttaann<ding on the ground or on metal floors. Portable tools which are likely to be used in wet and /connnd/iuiircftiwivae locatiJortnnes. 11 m Does this sound ok? J. A. Glass gk L SC 003102 LAA/I004552 sc 0031Q3 LAM004553 8104 Hkl-kKINUfcT . ' OSHA PROGRAM DIRECTIVE NO. 100-9 f / July 20, 1972 f To: National and Field Offices v Subject: "Grounding of Office Type Equipment such as Typewriters, Desk Lamps, Adding Machines, Clocks, Coffeepots, etc."; Clarification of 1. Purpose. To clarify the requirements for grounding office type electrical equipment. 2. Background. Section 250-45 of the National Electri cal Code provides the grounding requirements for cord and plug connected equipment. Numerous requests for clarification have been received from employers, manu facturers, and OS HA Compliance personnel. 3. Clarification. Section 250-45 of the National Electri cal Code provides the requirements for grounding cord and plug connected equipment. Most office type equip ment1 is in this category. The following items cover the key considerations for this grounding application: A. Under any of the following conditions, exposed noncurrent-carrying metal parts of cord- and plugconnected equipment, which are liable to become ener gized, shall be grounded: (1) IN HAZARDOUS LOCATIONS (see Articles 500 thru 517 of NEC, NFPA No. 70-1971) (2) WHEN OPERATED AT MORE THAN 150 VOLTS TO GROUND, except: (a) Motors, where guarded; (b) Metal frames of electrically heated appliances which are impracticable to ground may have grounding omitted by special permission2 in which case the frames shall be permanently and effectively insulated from the ground. (3) IN OTHER THAN RESIDENTIAL OCCU PANCIES, (a) Refrigerators,2 freezers, air conditioners, and (b) Clothes-washing, clothes-drying and dish-washing machines, sump pumps and (c) Portable, hand-held, motor-operated tools and ap pliances of the following types: drills, hedge clippers, lawn mowers, wet scrubbers, sanders and saws, and . (d) Cord- and plug-connected appliances used in damp or wet locations, or by persons standing on the ground or on metal floors or working inside of metal tanks or boilers, and (e) Portable tools which are likely to be used in wet and conductive locations. Exception No. 1: Portable tools which are likely to be used in wet and conductive locations need not be ground ed where supplied through an insulating transformer with ungrounded secondary of not over 50 volts. Exception No. 2: Portable tools and appliances protec ted by an approved system of double insulation, or its equivalent, need not be grounded. Where such an ap proved system is employed, the equipment shall be dis tinctively marked. Where conditions of maintenance and supervision assure that proper grounding of tools or appliances will be maintained (as, for example, on some factory production lines) it is recommended4 that ground ed-type tools and appliances be used. B. It is therefore concluded that, office type equip ment need nut be grounded unless they come within the ^considerations of (1), (2) or (3) jn paragraph A above. Id. Foetiwfas...... -- 1 Grounding of fixed electrical equipment is governed by Sections 250-42 and 43 of NEC. ! 2 Special permission is defined in the NEC page 70-11 and states, "Special permission: The written consent of the au thority enforcing this Code." This is further clarified in Subpart "S" of 1910.308(d)(2Xii) which states, " ... or (ii) with respect to an installation or equip ment of a kind which no nationally recognized testing laboratory accepts, certifies, lists, labels, or determines to be safe, if it is inspected or tested by another Federal agency, or by a State, municipal, or other local authority responsible for enforcing occupational safety provisions of the National Electrical Code, and found in compliance with the provisions of the National Electrical Code as applied in Section 1910.309." 2 Includes electrical water coolers. 4 Mandatory and advisory provisions of consensus standards are discussed in the introduction to Part 1910 (page 10466 of the Federal Register, May 29, 1971) which states, " -- The national consensus standards contain only mandatory provisions of the standards promulgated by those two organization! The standards of ANSI and NFPA may also contain advisory provisions and recom mendations the adoption of which by employers is en couraged, but they are not adopted in Part 1910." 5. Action. Inquiries about such office type equipment should be handled in accordance with this instruction. 6. Revision and Comments. Request for revisions and comments should be directed to the Assistant Secretary Attn: OCS. 7. Effective Date. This instruction is effective upon receipt and will remain in effect until canceled or super seded. OSHA PROGRAM DIRECTIVE NO. 100-10 August 28,. 1972 To: National and Field Offices Subject: Splicing and Tapping of Flexible Cords and Cables 1. Purpose. To clarify the use of splices and taps for flexible cords and cables. 2. Background. Numerous requests for clarification have been received from employers, manufacturers and OSHA compliance personnel in regard to the use of splices and taps in the flexible cords of electrical devices and utilization equipment. 3. Clarification. Section 400-3 of the National Elec trical Code states that flexible cord may be used only for: (a) Pendants (b) Wiring of fixtures (c) Connection of portable lamps and appliances (d) Elevator cables . Oeeupotional Safaty & Health Reporter 12 SC 003104 LAM004554