Type of cable<\/strong><\/td>Cat3 and Cat5 <\/td> Cat 5 <\/td> Cat 5 <\/td> Cat5 <\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\nOther cabling standards like ISO and TIA are also updating their standards to support four-pair PoE according to the amended IEEE standard.<\/p>\n\n\n\n
TSB-184 guidelines, approved by TIA, allow the implementation of power supplies over balanced ethernet cable. <\/p>\n\n\n\n
Also, ISO\/IEC 11801-6 international standard specifies Cat6a generic cabling for premises with single or multiple buildings to support IEEE802.3bt 4-pair Power over Ethernet and various other applications. <\/p>\n\n\n\n <\/figure>\n\n\n\n VoIP phones<\/p>\n\n\n
Can you get a shock with such an ethernet cable voltage?<\/h2>\n\n\n Although PoE has enough high voltage to allow efficient power transmission, it is still not too high to shock you.\u00a0<\/p>\n\n\n\n
However, this power can damage devices not designed to get Power over Ethernet.\u00a0<\/p>\n\n\n\n
Thus, PoE must conduct a signature detection process before the switch or PSE\/power sourcing equipment allows power transmission to powered devices like IP cameras and others.<\/p>\n\n\n
Signature detection process understanding <\/h3>\n\n\n In the signature detection process, a lower voltage passes through the IEEE-compatible powered devices (with 25 kilo-ohms resistance) and detects its characteristic signature. <\/p>\n\n\n\n
Once it is identified, PSE can safely apply higher voltages based on the classification.<\/p>\n\n\n\n
PSE knows the PD operating power based on the power class if a powered device shows a classification signature. <\/p>\n\n\n\nPoE power class<\/strong><\/td>1<\/strong><\/td>2<\/strong><\/td>3<\/strong><\/td><\/tr>PSE power available<\/strong><\/td>4.0 watts<\/td> 7.0 watts<\/td> 15.4 watts<\/td><\/tr> Maximum device power <\/strong><\/td>3.84 watts<\/td> 6.49 watts<\/td> 12.95 watts<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\nThe difference in the power given by PSE and power taken by PD is lost as heat in the cable. <\/p>\n\n\n\n
If PD does not show any signature during the signature detection process, it is put into class 0 and is given a maximum power of 12.95 watts.<\/p>\n\n\n\n
PoE+ devices or Type 2 devices are put into power class 4. If a regular PoE PSE detects this PoE+ device, it will put it into a class 0 device. <\/p>\n\n\n\n
However, a PoE+ PSE or 802.3at PSE will identify this device as a PoE+ device and repeat the classification stage to signal the power source to operate at full PoE+ power. <\/p>\n\n\n\n
A PoE+ PSE can supply a max. of 30 watts, and the maximum received power by a PoE+ device is 25.5 watts.<\/p>\n\n\n\n
Once the PSE detects the signature and classifies the device, it is time to start power transmission. Connect a 48-volt power supply to the power sourcing equipment to enable the working of PD. <\/p>\n\n\n\n
Once you switch on the power, the PSE automatically monitors the electric current that a PD should get. In case of too high\/too low power, it will cut the power supply, protecting itself from power overload.<\/p>\n\n\n
How can you add PoE to the network?<\/h3>\n\n\n You can add a PoE network through three primary methods. <\/p>\n\n\n\n
PoE switch: <\/strong>It\u2019s a network switch that injects Power over Ethernet. It links the network devices to the switch and identifies if they are PoE compatible. If yes, they will deliver power automatically. <\/p>\n\n\n\nYou can find these switches for a wide range of applications. Thus, there are simple, less-expensive switches with a few ports or complex rack-mounted switches with multiple ports requiring extensive management.<\/p>\n\n\n\n
With PSE, you can give PoE functions to a standard network switch. It allows you to update your existing LAN network to PoE.<\/p>\n\n\n\n
You can convert each LAN to PoE by simply putting a midspan device. As a result, it becomes a versatile choice in applications requiring fewer ports.<\/p>\n\n\n\n
PoE splitter:<\/strong> You can also use a splitter for updating powered deliveries to PoE-capable devices. <\/p>\n\n\n\nThe PoE splitter links to the PD network connection and injects power, transforming it to a sufficient level suitable for the camera.<\/p>\n\n\n\n <\/figure>\n\n\n\nLAN and POE<\/p>\n\n\n
Other Safety Measures on Cabling for PoE:<\/h2>\n\n\n As we read above, some power is lost as heat in the ethernet cables transmitting power. Due to this heat, there may be high insertion loss, high power dissipation, and shorter permissible cable lengths.<\/p>\n\n\n\n
A cable\u2019s temperature must not exceed its allowable limits. The TIA, or Telecommunications Industry Association, recommends only a 15-degree max allowed rise of temperature over the cable\u2019s ambient temperature in power over cables. <\/p>\n\n\n\n
You can lower the cabling temperature in Power over Ethernet applications through the following ways:<\/p>\n\n\n
Lower the number of cables in a bundle:<\/h3>\n\n\n Instead of using large or tight bundles, use small cable bundles to reduce the chances of high temperatures in cables significantly. <\/p>\n\n\n\n
For instance, a cable bundle with 91 cables has three times higher temperatures than three bundles with 37 cables each. Also, if you separate these three cable bundles physically, it can further reduce the maximum temperature.<\/p>\n\n\n
Ethernet cable voltage: Pick a high-rated category cable:<\/h3>\n\n\n High-rated cables have larger gauge sizes; when the temperature rises, the larger conductors of these higher gauge sizes<\/a> perform better than small gauge cables.<\/p>\n\n\n\n According to TIA, if you use a high-category cable, you can use a large bundle with a maximum of 15 degrees rise in temperature.\u00a0<\/p>\n\n\n\n
The maximum acceptable bundle size for Cat5e is 52 cables, for Cat6 is 64, and for Cat 6a is 74 cables. <\/p>\n\n\n\n
Also, a high-rated category cable has a higher current capacity at a maximum of 15 degrees permissible temperature.<\/p>\n\n\n
Ethernet cable voltage: Avoid copper-clad aluminum for PoE:<\/h3>\n\n\n Copper-clad aluminum has high DC resistance and thus has less conductivity than pure copper.<\/p>\n\n\n\n
As a result, it loses more power, generating more heat. If the cable connection length is longer, the heat generated also rises. <\/p>\n\n\n\n
Such high heat and power loss are unsuitable for PoE applications, so avoid them with switches and injectors.<\/p>\n\n\n\n
So, it is advisable to use a high-category cable with pure copper conductors to minimize the increase in temperature. <\/p>\n\n\n\n
The best is to use Cat6a cable as it supports the highest data throughput in 10GBASE-T. <\/p>\n\n\n\n
Also, there are no bundle size restrictions for present and future applications related to PoE.<\/p>\n\n\n
Conclusion: <\/h2>\n\n\n You need not worry about electrical shocks from PoE in regular operation and management. They are safe and do not risk your life. However, it is still advisable not to work on the cable while they get power. <\/p>\n\n\n\n
Don\u2019t hesitate to call an electrician in case of any faulty electrical connections. Also, always use high-rated cables as they are safe and secure.<\/p>\n\n\n\n
Get these high-rated Ethernet cables from a reputed manufacturer like Cloom. <\/p>\n\n\n\n
We are a leading cable manufacturer<\/a> manufacturing and designing custom cable assemblies and wiring harnesses for our clients worldwide.<\/p>\n","protected":false},"excerpt":{"rendered":"Power over Ethernet has become helpful when you cannot access AC power plugs and need to install IP cameras, IP phones, and wireless devices. If you employ extra … <\/p>\n
Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":10130,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"yoast_head":"\nEthernet cable voltage: Is Power over Ethernet Safe?<\/title>\n \n \n \n \n \n \n \n \n \n \n \n \n\t \n\t \n\t \n \n \n \n\t \n\t \n\t \n