Introduction to Server Power Cord

The power cord is an indispensable unit to support the work of power supply. Connecting the servers and PDU (power distribution unit), server power cord plays an important role in ensuring good electricity supply. However, the standard for the connector type and voltage level of power cord are different in different countries. To make the network system work with high performance level, it is necessary to choose a suitable power cord. This article will give an introduction to server power cord to help you make the choice.

Overview of Power Cord

Although there are many different types of power cords used around the word, the structures of them are similar. In general, power cord consists of three parts: plug, cord and receptacle. The IEC60320 power cord and NEMA power cord are the most commonly seen types. The former one is commonly seen in US, while the latter one is widely used in North America and other countries that use the standards set by the NEMA. The following figure shows c13 to c14 power cord, nema 5 15p to c13 power cord, c14 to c15 power cord and nema 5 15p to c15 power cord, which are the most popular one power cable manufacturers like Dell, HP and IBM.

power cord
Low Density System

For low density system, it is very easy to install the power cord. The server needs to use a country-specific power cord for direct connection to a facility AC feed. However, server availability goals can require providing redundant AC power to the server in the form of a redundant AC bus or a UPS. As the following figure shows, server in figure A uses c13 to c14 power cord, and server in figure B uses nema 5 15p to c13 power cord.

power cord in low density system
Medium Density System

For medium density system, the installation of power cord is a little complex than that of low density system. To achieve an effective power connection, different types and other accessories are may be needed. As the following figure shows, power connections are achieved using modular PDH, extension bars and c13 to c14 power cord assemblies. For server which contains hot-pluggable fans accessible by sliding the chassis out on rails, the power cord connecting to the server must have adequate length and slack to allow chassis movement while staying connected and powered up.

power cord in medium density system
High Density System

For high density system, the length of power cord can be short since cable movement is less frequent. The following figure shows three kinds of methods to connect enclosures to AC power. The first one in the upper area shows that the c13 to c14 power cord is used to connect a single-supply server to a vertical mount PDU, which is suitable for lower-density installations. The second one in the central area shows the use of C13 x4-to-C20 fixed cord extension bars, which is a recommended method for extreme-density installations using redundant power supplies. The last one shows the use of a C13 x2-to-C20 Y-cable assembly, which is recommended for connecting a server with dual 1200-watt power supplies directly to a PDU core with C19 outlets.

power cord in high density system
Conclusion

Power cord serves as an important bridge in the network device power supply system. I hope after reading this article, you can have a better understanding of server power cord. FS.COM offers different types of IEC power cords, NEMA power cords, and jumper cords for server rack equipment with different colors and different lengths. If you want to know more details, please visit our website.

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