This document provides guidelines on safety and electrostatic discharge (ESD) for maintenance and service personnel at Cray Research, Inc. It outlines the importance of following lockout/tagout procedures to isolate hazardous energy sources when servicing equipment in order to prevent accidents, injuries, and damage. Specific guidelines are provided on using locks and tags to isolate various electrical and mechanical energy sources, such as hydraulics, pneumatics, pressurized water and steam. The document also describes the proper procedures for installing lockout/tagout devices, working in a group lockout/tagout situation, and restoring equipment to service.

1. Safety and ESDSafety and ESD
GuidelinesGuidelines
Cray Research, Inc.Cray Research, Inc.
October 11, 2013October 11, 2013

2. Safety GuidelinesSafety Guidelines
 Alert maintenance and service personnelAlert maintenance and service personnel
to workplace hazardsto workplace hazards
 Help reduce accidents and injuries in theHelp reduce accidents and injuries in the
workplaceworkplace
 Help prevent damage to CRI computerHelp prevent damage to CRI computer
system equipmentsystem equipment
 Mandated by OSHA CFR 1910.147Mandated by OSHA CFR 1910.147

3. OSHA Injury StatisticsOSHA Injury Statistics
 According to U.S. Department of Labor,According to U.S. Department of Labor,
control of hazardous energy is the 5control of hazardous energy is the 5thth
mostmost
frequently cited OSHA violationfrequently cited OSHA violation
 Fines cost companies hundreds ofFines cost companies hundreds of
thousands of dollars each yearthousands of dollars each year
 Electrocution resulted in 9% of all workplaceElectrocution resulted in 9% of all workplace
fatalities for 2011fatalities for 2011

4. Lockout/Tagout SafetyLockout/Tagout Safety
 All CRI employees required to followAll CRI employees required to follow
lockout/tagout procedures when servicinglockout/tagout procedures when servicing
equipmentequipment
 Helps ensure that all potentially hazardousHelps ensure that all potentially hazardous
energy is locked out and isolatedenergy is locked out and isolated
 Energy-isolating devices available throughEnergy-isolating devices available through
Logistics Department:Logistics Department:
• Lockout/tagout cards − part # 01670500Lockout/tagout cards − part # 01670500
• Small padlocks − part # 01673600Small padlocks − part # 01673600
• Large padlocks − part # 01673601Large padlocks − part # 01673601

5. Lock and Tag CriteriaLock and Tag Criteria
Locks shall:Locks shall:
 Be provided by Cray ResearchBe provided by Cray Research
 Be able to withstand exposure to wet andBe able to withstand exposure to wet and
damp conditionsdamp conditions
 Be standardized within the work groupBe standardized within the work group
 Be substantial enough to prevent accidentalBe substantial enough to prevent accidental
removalremoval

6. Lock and Tag Criteria (cont.)Lock and Tag Criteria (cont.)
Tags shall:Tags shall:
 Be provided by Cray ResearchBe provided by Cray Research
 Be able to withstand exposure to wet andBe able to withstand exposure to wet and
damp conditionsdamp conditions
 Be standardized in print and formatBe standardized in print and format
 Identify the individual by nameIdentify the individual by name

7. Lockout/Tagout CardLockout/Tagout Card

8. Definitions and TermsDefinitions and Terms
 Authorized EmployeeAuthorized Employee ─ Employees─ Employees
authorized to implement lockout/tagoutauthorized to implement lockout/tagout
proceduresprocedures
 Affected Employee ─ Employees whoAffected Employee ─ Employees who
operate equipment affected by lockout/tagoutoperate equipment affected by lockout/tagout
proceduresprocedures
 Other Employee ─ Employees who work inOther Employee ─ Employees who work in
the area where lockout/tagout occursthe area where lockout/tagout occurs

9. Definitions and Terms (cont.)Definitions and Terms (cont.)
 Energized EquipmentEnergized Equipment ─ Equipment that is─ Equipment that is
connected to an energy source or equipmentconnected to an energy source or equipment
that contains residual or stored energythat contains residual or stored energy
 Energy-isolation Device ─ A mechanicalEnergy-isolation Device ─ A mechanical
device that physically prevents thedevice that physically prevents the
transmission or release of energytransmission or release of energy
 Lockout ─ Placement of a lockout device onLockout ─ Placement of a lockout device on
an energy-isolation devicean energy-isolation device
 Lockout Device ─ Holds energy device in aLockout Device ─ Holds energy device in a
safe positionsafe position

10. Isolating Electrical SourcesIsolating Electrical Sources
 Isolate and lock both electrical andIsolate and lock both electrical and
mechanical energy sourcesmechanical energy sources
 Energy sources include:Energy sources include:
 HydraulicsHydraulics
 PneumaticsPneumatics
 Pressurized waterPressurized water
 SteamSteam
 RefrigerantsRefrigerants

11. Isolating Electrical andIsolating Electrical and
Mechanical SourcesMechanical Sources
 Lock and tag all equipment thatLock and tag all equipment that
uses/produces electrical sourcesuses/produces electrical sources
 Isolate and lock all equipment that storesIsolate and lock all equipment that stores
mechanical energymechanical energy
 Isolate hydraulic linesIsolate hydraulic lines
 Isolate pneumatic linesIsolate pneumatic lines

12. Isolating Electrical andIsolating Electrical and
Mechanical Sources (cont.)Mechanical Sources (cont.)
 Isolate refrigeration linesIsolate refrigeration lines
 Isolate valves on equipment with pressurizedIsolate valves on equipment with pressurized
water or steamwater or steam

13. Lockout/Tagout ProcedureLockout/Tagout Procedure
Refer to handout:Refer to handout:
1.1. Survey area to locate all energy sourcesSurvey area to locate all energy sources
2.2. Notify all affected employees thatNotify all affected employees that
lockout/tagout is requiredlockout/tagout is required
3.3. Verify correct operation of voltage testerVerify correct operation of voltage tester
4.4. Shut off equipment to be serviced byShut off equipment to be serviced by
normal meansnormal means

14. Lockout/Tagout ProcedureLockout/Tagout Procedure
(cont.)(cont.)
5.5. Operate all switches, valves, or levers toOperate all switches, valves, or levers to
ensure stored energy is disconnectedensure stored energy is disconnected
6.6. Lock and tag the energy-isolation deviceLock and tag the energy-isolation device
with assigned lock and tagwith assigned lock and tag
7.7. Use a voltage tester to verify no voltage isUse a voltage tester to verify no voltage is
present on equipment’s electrical circuitpresent on equipment’s electrical circuit
8.8. Activate equipment controls to ensureActivate equipment controls to ensure
equipment will not operateequipment will not operate

15. Group Lockout/TagoutGroup Lockout/Tagout
ProcedureProcedure
If more than one person is required to lock andIf more than one person is required to lock and
tag a piece of equipment:tag a piece of equipment:
 Each person must place lock and tag onEach person must place lock and tag on
energy-isolation deviceenergy-isolation device
 If device cannot accept multiple locks, useIf device cannot accept multiple locks, use
a multiple lockout haspa multiple lockout hasp

16. Restoring Equipment to ServiceRestoring Equipment to Service
To restore electrical equipment to service:To restore electrical equipment to service:
1.1. Remove all tools from work areaRemove all tools from work area
2.2. If applicable, restore any previouslyIf applicable, restore any previously
removed machine guardsremoved machine guards
3.3. Check the area to ensure no personnel areCheck the area to ensure no personnel are
near equipmentnear equipment
4.4. Remove all locks and tags from the energy-Remove all locks and tags from the energy-
isolation device(s)isolation device(s)
5.5. Test-run the equipment and inspect forTest-run the equipment and inspect for
normal operationnormal operation

17. Removing locks and tagsRemoving locks and tags
installed by other employeesinstalled by other employees
Remove a lock and tag installed by anotherRemove a lock and tag installed by another
employee only if:employee only if:
 The employee who installed the lock and tagThe employee who installed the lock and tag
has left the facilityhas left the facility
 Reasonable efforts have been made toReasonable efforts have been made to
contact the employee to remove the lock andcontact the employee to remove the lock and
tagtag
 Supervisor of absent employee must removeSupervisor of absent employee must remove
lock and taglock and tag

18. ReferencesReferences
 Cray Research, Inc. (1994). SafetyCray Research, Inc. (1994). Safety
and ESD guidelines. Publicationand ESD guidelines. Publication
number HG-016-Anumber HG-016-A