FAQs

Q: How is it that the specifications for the ProCurve 620 External and Redundant Power Supply state a value of 400BTU/hr and the manual states 4535BTU/hr?
The 400 BTU/hr is the amount of heat that is generated by the 620 itself inside the wiring closet or data center. The 4500 BTU/hr is the maximum heat generated by the power available in the 620. The difference is described below.

• The RPS functionality of the 620 only generates significant heat if it is actually providing power to a connected switch. That only occurs if the system portion (12V) of a power supply in a switch fails or loses power due to a power main failure. Only one of the two 12V power supplies (the one in the switch or one in the 620) is active at any given time. Since both the switch and the 620 will be in the same room, the total heat for the 12V in the 620 can be ignored since we already account for it in the switch specs. The only additional heat generated is due to the 620 12V supply with no load which is very low.
• The 50V EPS power supplies in the 620, even when providing full power, will generate little heat into the local environment because most of the power will be used (and generating heat) where it is consumed - in the PoE powered device. Since most, if not all, of the powered devices will be outside the wiring closet or data center where the 620 is located, this heat is not included in the 400 BTU/hr. The only heat generated in the 620 itself for the 50V supplies is due to the heat loss of the power supply itself. The 400 BTU/hr includes both 50V supplies in the 620 delivering full or maximum power across the EPS links. Anything less than full power delivery from the PoE portion of the power supplies would generate less heat.

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Q: What is a jumper cable and how is it used?
A jumper cable (also known as a jumper cord), provides a power interconnect between a LAN Switch and a power distribution device, such as a Power Distribution Unit (PDU) or an Uninterruptible Power Supply (UPS).

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Q: Does ProCurve Networking by HP have jumper cables for its LAN Switch products?
Yes, ProCurve Networking by HP does have jumper cables available for its LAN Switch products through the worldwide HP Parts Store at www.hp.com/buy/parts.

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Q: Why are ProCurve jumper cables required for use with a PDU or UPS?
The ProCurve Networking by HP jumper cables are designed to HP specifications to minimize defects in materials and workmanship. The jumper cables were developed specifically to meet the extended temperature specifications, 0°C to 55°C (32°F to 131°F) of ProCurve switches while complying with international laws.

Using jumper cables which do not meet ProCurve’s specifications could result in overheating of the jumper cables. Use the proper jumper cables listed for your ProCurve switches. Use of any other jumper cable is not supported by ProCurve.

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Q: What do the jumper cable connectors look like?
The following table displays the connectors for C14 to C15 jumper cables and C19 to C20 jumper cables.

The C15 or C19 connector inserts into the power inlet on the switch power supply, while the C14 or C20 connector inserts into the receptacle on a power distribution device, PDU or UPS.

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Q: What ProCurve products require a C14 to C15 or a C19 to C20 jumper cable to connect to a PDU or UPS?
The table below displays, by country, the jumper cable part number for a specific ProCurve product. The jumper cable required by a ProCurve 8200zl or 5400zl switch and a ProCurve Power Supply Shelf, depends on the wattage of the power supply in the ProCurve product(875 W (J8712) or 1500 W (J8713)). Jumper cables are available in two lengths, 1 meter and 2.5 meters.

Country	Length (meters)	ProCurve Switch 3500yl/6200yl 3	ProCurve Switch 8200zl/5400zl and Power Supply Shelf			ProCurve 620 Red/Ext Power Supply 2
			875 W Supply 3		1500 W Supply 2
Australia/ New Zealand	1 m 2.5 m	8121-1093 1 8121-1094 1			8121-1089 8121-1090
China	1 m 2.5 m	8121-1093 1 8121-1094 1			8121-1089 8121-1090
Continental Europe	1 m 2.5 m	8121-1093 1 8121-1094 1			8121-1089 8121-1090
Denmark	1 m 2.5 m	8121-1093 1 8121-1094 1			8121-1089 8121-1090
Israel	1 m 2.5 m	8121-1093 1 8121-1094 1			8121-1089 8121-1090
Japan	1 m 2.5 m	8121-1092    8121-1091			8121-1089 8121-1090
South Africa/ India	1 m 2.5 m	8121-1093 1 8121-1094 1			8121-1089 8121-1090
Switzerland	1 m 2.5 m	8121-1093 1 8121-1094 1			8121-1089 8121-1090
Taiwan	1 m 2.5 m	8121-1092    8121-1091			8121-1089 8121-1090
Thailand	1 m 2.5 m	8121-1093 1 8121-1094 1			8121-1089 8121-1090
U.K.	1 m 2.5 m	8121-1093 1 8121-1094 1			8121-1089 8121-1090
Hong Kong/ Singapore	1 m 2.5 m	8121-1093 1 8121-1094 1			8121-1089 8121-1090
U.S./Canada/ Mexico	1 m 2.5 m	8121-1092    8121-1091			8121-1089 8121-1090

¹ – Availability of 8121-1093 and 8121-1094 jumper cables planned for May 2008
² – C19 to C20 cable: The C19 connector connects into the power inlet on the switch’s power supply, while the C20 connector connects into the receptacle on a power distribution unit.
³ – C14 to C15 cable: The C15 connector connects into the power inlet on the switch’s power supply, while the C14 connector connects into the receptacle on a power distribution unit.

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Q: What are the technical specifications for the C14 to C15 and C19 to C20 jumper cables?
The table below contains the technical specifications for the C14 to C15 and C19 to C20 jumper cables.

¹ – Rating of 20 A at 240 V in U.S. and Canada
² – Rating of 16 A at 240 V in Japan, Taiwan, Australia/New Zealand, China, Continental Europe, Denmark, Israel, South Africa/India, Switzerland, Thailand, U.K., and Hong Kong/Singapore

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Q: How does a customer purchase the C14 to C15 or C19 to C20 jumper cables?
The C14 to C15 jumper cables or C19 to C20 jumper cables are orderable through the HP Parts Store at www.hp.com/buy/parts. The C14 to C15 jumper cables, 8121-1093 and 8121-1094 are currently undergoing development and regulatory testing and will be available in May 2008.

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