Slickdeals is community-supported.  We may get paid by brands for deals, including promoted items.
Sorry, this deal has expired. Get notified of deals like this in the future. Add Deal Alert for this Item
Frontpage

Monoprice SlimRun Cat6a Ethernet Cables: 10-Pack 10' (Yellow) $15, 5-Pack 5' Expired

If you purchase something through a post on our site, Slickdeals may get a small share of the sale.
Deal
Score
+68
31,951 Views
2 for $10
$18.10

Community Wiki

Last Edited by jagoodie January 29, 2020 at 05:27 PM
FYI - thinner wires may be problematic for POE applications but work great otherwise

Basic Voltage Drop Law
Vdrop = IR

P(loss) = V(drop)*I
V(drop) = I*R
Substitute for V and the formula for power loss is I^2*R

where:
I : the current through the object, measured in amperes
R : the resistance of the wires, measured in ohms

comparing these cables to a cat6/6A which has 23 AWG copper wires:

AWG inch mm per inch per cm kcmil mm2 O/km O/kFT
23 0.0226 0.573 44.3 17.4 0.509 0.258 66.79 20.36
30 0.0100 0.255 99.7 39.3 0.101 0.0509 338.6 103.2

103/20 = about 5

So a 30 AWG wire has 5x the resistance vs a 23 AWG wire

basically you're looking at losing 5x more power when using a 30 AWG wire compared to a 23 AWG wire.

ref:
https://www.calculator.net/voltag...lator.html

Your comment cannot be blank.

Featured Comments

TL;DR: For short patches these aren't bad despite the "experts" here going on about "but physics". (I've got an CompE degree too TYVM)


I assure you, they accounted for 'physics' when they wrote 802.3at Type2 "PoE+" and the resistance numbers you're quoting are actually incorrect to boot. How about we also look up the POE+ and cable specs?
- max cable resistance is 12.5 ohms
- max voltage drop is 7.5v (based on PSE vs PD)
- max power loss is 4.5w (based on PS vs PD)

MonoPrice lists: 37.6 ohms/100m so the 50' (15m) cable is 5.5 ohms.
22g/23g cat6 usually comes in ~9-9.5 ohms/100m

Calculate your run length + patch cord and decide accordingly. If thin patch cables are needed due to cable count, aesthetics, or other reasons make sure your total run is in spec.
e.g. 25m plenum cat6 + 2m patch = 3.13 ohms and is well with spec.


*Mic drop*


But wait... calculating for volts and then talking about power (watts)? Those are NOT the same thing/unit/measurement. Might as well say you've got a 18 gallon gas tank therefore your MPGs are better. If we want to work out the math for fun:

P(loss) = V(drop)*I
V(drop) = I*R
Substitute for V and the formula for power loss is I^2*R

- 600ma (0.6A) max @ 12.5 ohms max = 7.5V (which is exactly what the PoE spec calls for)
- Power loss would thus be 0.6^2*12.5 = 4.5w (which, shockingly, is exactly to spec)


And EXTRA ALSO - this is *only* for PoE delivery. It has NOTHING to do with attenuation which is *far* more relevant for 1G/10G runs. Folks having problems with these cables are almost certainly having signal issues, not PoE, and especially so if they've got longer runs near/at/over max spec.
very thin wires: 30AWG

recommend not using these for PoE and go instead with cable that has copper 23/24 AWG wires for PoE
For those wondering, thickness of wire increases as the gauge number decreases. It's counter intuitive. So, thought I'd mention. 30 is less thick than 24.

Sign up for a Slickdeals account to remove this ad.

Joined Dec 2011
L6: Expert
> bubble2 1,254 Posts
130 Reputation
sagrr
01-23-2020 at 04:38 AM.
01-23-2020 at 04:38 AM.
It seems like it's a lot cheaper on amazon usually?
Reply
Joined Jan 2005
L6: Expert
> bubble2 1,719 Posts
351 Reputation
DenMan
01-23-2020 at 06:44 AM.
01-23-2020 at 06:44 AM.
Quote from sagrr :
It seems like it's a lot cheaper on amazon usually?
I just compared prices - for these particular sets of cables they are definitely cheaper on Monoprice as of now. I thought shipping would make them even out but I'm actually getting the rare free shipping from Monoprice for these sets.

Edit to add - I like these cables a lot, I have about a dozen of them now. They are nice and slim yet rugged. Not totally "lay flat" but not nearly as bad as most ethernet cables that keep that coil shape.

Thanks OP, picked up two packs.
Reply
Last edited by DenMan January 23, 2020 at 07:17 AM.
Joined Sep 2012
L4: Apprentice
> bubble2 393 Posts
121 Reputation
The_Wilder_Spirit
01-23-2020 at 07:26 AM.
01-23-2020 at 07:26 AM.
I love these cables. Really practical and less Ridgid than traditional cat cable.
Reply
Joined Mar 2008
L10: Grand Master
> bubble2 9,308 Posts
4,355 Reputation
mat2000
01-23-2020 at 07:46 AM.
01-23-2020 at 07:46 AM.
very thin wires: 30AWG

recommend not using these for PoE and go instead with cable that has copper 23/24 AWG wires for PoE
Reply
Joined Jun 2014
L3: Novice
> bubble2 151 Posts
93 Reputation
SickNotes
01-23-2020 at 07:59 AM.
01-23-2020 at 07:59 AM.
For those wondering, thickness of wire increases as the gauge number decreases. It's counter intuitive. So, thought I'd mention. 30 is less thick than 24.
Reply
Joined Dec 2016
L4: Apprentice
> bubble2 428 Posts
196 Reputation
fvp1992
01-23-2020 at 08:02 AM.
01-23-2020 at 08:02 AM.
👍 Does this work for any other lengths/colors?
Reply
Joined Dec 2008
The Discerning Bargainer
> bubble2 243 Posts
114 Reputation
elmedico27
01-23-2020 at 08:03 AM.
01-23-2020 at 08:03 AM.
Quote from mat2000 :
very thin wires: 30AWG

recommend not using these for PoE and go instead with cable that has copper 23/24 AWG wires for PoE
Thanks for the heads up. Have you used these in a PoE situation with negative results? I actually have a pack of these in 1ft that I really like but I'm looking into adding a PoE switch for a couple devices and was wondering if I should move to some non-SlimRun cables for those.
Reply

Sign up for a Slickdeals account to remove this ad.

Joined Jun 2005
moar touchpadz!
> bubble2 3,539 Posts
350 Reputation
dragontales
01-23-2020 at 08:06 AM.
01-23-2020 at 08:06 AM.
Anyone run these under carpet? Any noticeable bump?
Reply
Joined Dec 2009
L6: Expert
> bubble2 1,047 Posts
229 Reputation
spamdie
01-23-2020 at 08:08 AM.
01-23-2020 at 08:08 AM.
Quote from elmedico27 :
Thanks for the heads up. Have you used these in a PoE situation with negative results? I actually have a pack of these in 1ft that I really like but I'm looking into adding a PoE switch for a couple devices and was wondering if I should move to some non-SlimRun cables for those.

They can work with poe but the range is limited. The top end brand that sells and certifies their cables that is not monoprice has like a maximum of 27 meters. But normal wires would be better in any case. It all depends on the device though. If it is a low power device you can get away with it.
Reply
Last edited by spamdie January 23, 2020 at 08:10 AM.
Joined Dec 2009
L6: Expert
> bubble2 1,047 Posts
229 Reputation
spamdie
01-23-2020 at 08:11 AM.
01-23-2020 at 08:11 AM.
Quote from dragontales :
Anyone run these under carpet? Any noticeable bump?

Probably not good to run this wire under carpet.
Reply
Joined Mar 2008
L10: Grand Master
> bubble2 9,308 Posts
4,355 Reputation
mat2000
01-23-2020 at 08:13 AM.
01-23-2020 at 08:13 AM.
Quote from elmedico27 :
Thanks for the heads up. Have you used these in a PoE situation with negative results? I actually have a pack of these in 1ft that I really like but I'm looking into adding a PoE switch for a couple devices and was wondering if I should move to some non-SlimRun cables for those.
Hi elmedico27

Physics

The ability of a wire to transmit power is based on the surface area, the smaller the diameter of the wire the higher the resistance, heat, power loss - which means less efficiency and less distance the cable can run.

http://poe-world.com/Calculator/

Basically: you really do not want to use thin wires to transmit power
Reply
Joined Sep 2011
Deplorable
> bubble2 2,918 Posts
662 Reputation
jhooper
01-23-2020 at 08:20 AM.
01-23-2020 at 08:20 AM.
FYI: All CATx certified cables must be pure copper. CCA (Copper Clad Aluminum) isn't up to spec, but it's a lot cheaper.
Reply
Page 1 of 6
Start the Conversation
 
Link Copied

The link has been copied to the clipboard.