Sun Microsystems Netra t1 100, Руководство пользователя и администратора

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14 Netra t1 User and Administration Guide • June 2000
DC Connection Materials
Grounding
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One Thomas & Betts two-hole lug (part number: 54204-UB) suitable for 8 AWG
conductor or UL/CSA approved equivalent having 5/8 inch pitch. Torque value:
3.5 Nm maximum. Two M5 studs and cupwasher nuts are supplied on the rear of
the chassis for connection.
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A Thomas & Betts crimping tool (part number: TBM 5-S), or approved equivalent,
is required to secure the lug onto the cable.
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An earthing bus bar that is near the equipment and easily accessible.
Caution –
External filtering and/or surge suppression devices may be required on
the power feeds where branch circuit electromagnetic characteristics are unknown.
DC Supply and Ground Conductor
The requirements are:
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Suitable conductor material: tinned copper (stranded) only
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Conductors: 12 AWG maximum (between the Netra t1 Model 100 and the circuit
breaker). There are three conductors:
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–48 VDC/–60 VDC Supply (pin 1) (12 AWG)
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Ground connection to power supply (pin 2) (12 AWG)
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–48 VDC/–60 VDC Return (pin 3) (12 AWG)
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Cable insulation rating: minimum 75˚C, low smoke fume (LSF), flame retardant
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Cable must conform to GR63-CORE fire resistance requirements
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Branch circuit cable insulation color: per applicable National Electrical Codes
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Grounding cable insulation color: green/yellow
SysAdmin.book Page 14 Friday, March 30, 2001 2:38 PM