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I need PoE for some devices (CCTV cameras, WiFI Access Points) - can these wires be run in parallel with

1. Cat6 cables going to non PoE devices (e.g. datapoints of PC)


2. Cat6 HDBaseT Cables being used for HDMI over Cat6

Can you run PoE Cat6 alongside standard Cat6 cables?

Yes. But you should be running Cat6A cable because of heat dissipation not interference (see later).

Notes:

• Cat6 can be shielded or unshielded. Shielded will clearly be better.




• Cat7 has an overall shield as well as individual shielding of every pair (so may be even more suitable).

Twisted pair cables are HIGHLY resistant to interference pickup. Furthermore, DC does not cause interference, since it is basically an unchanging current, so there's no change in magnetic fields from it to cause interference (other than when turned on, and off - and the twisted pair cables will reject that interference by design, anyway.)

I have many bundles of cables including POE cables in my work role. Interference is not a factor.

Source data wiring - Can PoE cause interference with neighboring non-PoE Ethernet cables? - Home Improvement Stack Exchange

You should be running Cat6A cable

In fact, a new PoE standard, IEEE 802.3bt, supports up to 100W of
power per cable.

But higher power levels running through a cable can cause performance
issues – namely by making the cable hotter. And when the cable gets
hotter, insertion loss increases. This escalates your chances of your
business experiencing a productivity killer – downtime – and may also
damage the cable itself.

You’re better off using Category 6A for a number of reasons we’re
going to cover here.

1. 
   

   Larger-Gauge Diameter

   
   
   

   A cable that offers a larger conductor diameter can reduce resistance
   and keep power waste to a minimum because it has a lower temperature
   increase compared to smaller-gauge Category 5e and Category 6 cables.
   This better performance will provide additional flexibility, including
   larger bundle sizes, closed installation conditions and higher ambient
   temperatures.

   
   
   

   For example, when comparing 23-gauge and 24-gauge cabling, there is a
   large variance in how power is handled. As much as 20% of the power
   through the cable can get “lost” in a 24-gauge Category 5e cable,
   leading to inefficiency.

   
   


2. 
   

   Less Power Loss

   
   
   

   Energy efficiency increases when structured cable maximizes the power
   running through it to waste as little as possible.

   
   
   

   As we mentioned above, losing nearly one-fifth of the total power in
   a 24-gauge Category 5e cable may seem like a lot of power loss – and
   it is. But doing the math will show you that the total dollar amount
   comes out to be only around $7 per year. The numbers start adding up;
   however, when you realize that it costs $7 per year per PoE device
   across your entire facility or campus – from surveillance cameras to
   wireless access points. Although it may seem like a small dollar
   amount when viewed out of context, power dissipation through a cable
   can ultimately lead to higher-than-necessary operating costs.

   
   
   

   It’s also important to keep in mind that the number of Power over
   Ethernet devices is only going to increase in your facility as you
   install more wireless access points to support things like BYOD (bring
   your own device). As a result, you’ll need more PoE cable – and there
   will be more opportunity for wasted energy.

   
   
   

   Less power is dissipated in a 23-gauge Category 6A cable, which means
   that more of the power being transferred through the cable is actually
   being used, improving energy efficiency and lowering operating costs.

   
   


3. 
   

   Tightly Packed Cables

   
   
   

   If your cables are tightly packed in their trays and pathways, the
   chance for heat increases because it doesn’t have a chance to
   dissipate away from the cable.

   
   
   

   Some Category 6A cable has enough insertion loss margin to handle the
   extra heat generated from tightly packed cables without impacting
   performance. (This doesn’t apply to all Category 6A cables. Even
   though they promise a 100 m solution, some cables may become an 85 m
   solution if the temperature increase is too high.)

   
   
   

   Belden 10GXS cable can handle the added heat while maintaining its
   full 100 m performance – and it’s the only Category 6A cable that can
   make this claim.

   
   

Source 3 Reasons Why Power over Ethernet Demands CAT 6A Cable

Further Reading

• IEEE 802.3bt - The 100 Watt PoE Standard | Versa Technology


• The IEEE 802.3bt standard’s impact on the expanding PoE marketplace | Cabling Installation & Maintenance