Sorry, this deal has expired. Get notified of deals like this in the future. Add Deal Alert for this Item
Frontpage Deal

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

Share
Good deal?
You gave thanks to Discombobulated for this post.
Thank you!
Discombobulated posted this deal. Say thanks!
If you purchase something through a post on our site, Slickdeals may get a small share of the sale.
Deal
Score
+70
29,370 Views
2 for $10
$18.10
About the OP
Send Message
Pro Deal Editor
SoCal Joined Dec 2005 Slickdeals Editor Wanted: ⭐⭐⭐⭐⭐
158,319 Reputation Points
10,912 Deals Posted
7,548 Votes Submitted
27,113 Comments Posted

Community Wiki

Last Edited by jagoodie January 29, 2020 at 06:27 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

84 Comments

1 2 3 4 5

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.
28 Helpful?
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.
11 Helpful?
very thin wires: 30AWG

recommend not using these for PoE and go instead with cable that has copper 23/24 AWG wires for PoE
11 Helpful?

Sign up for a Slickdeals account to remove this ad.

This comment has been rated as unhelpful by Slickdeals users
Joined Dec 2011
L5: Journeyman
633 Posts
90 Reputation
#4
It seems like it's a lot cheaper on amazon usually?
Reply Helpful Comment? 1 3
This comment has been rated as unhelpful by Slickdeals users
Joined Jan 2005
L6: Expert
1,591 Posts
307 Reputation
#5
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 Helpful Comment? 3 0
Last edited by DenMan January 23, 2020 at 08:17 AM.
This comment has been rated as unhelpful by Slickdeals users
Joined Sep 2012
L3: Novice
261 Posts
94 Reputation
#6
I love these cables. Really practical and less Ridgid than traditional cat cable.
Reply Helpful Comment? 0 0
This comment has been rated as unhelpful by Slickdeals users
Joined Mar 2008
L10: Grand Master
7,985 Posts
3,666 Reputation
Our community has rated this post as helpful. If you agree, why not thank ?
#7
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 Helpful Comment? 13 2
This comment has been rated as unhelpful by Slickdeals users
Joined Jun 2014
L2: Beginner
30 Posts
14 Reputation
Our community has rated this post as helpful. If you agree, why not thank ?
#8
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 Helpful Comment? 12 1
This comment has been rated as unhelpful by Slickdeals users
Joined Dec 2016
L2: Beginner
83 Posts
18 Reputation
#9
👍 Does this work for any other lengths/colors?
Reply Helpful Comment? 0 0
This comment has been rated as unhelpful by Slickdeals users
Joined Dec 2008
The Discerning Bargainer
196 Posts
86 Reputation
Pro
#10
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 Helpful Comment? 0 0

Sign up for a Slickdeals account to remove this ad.

This comment has been rated as unhelpful by Slickdeals users
Joined Jun 2005
moar touchpadz!
2,971 Posts
307 Reputation
#11
Anyone run these under carpet? Any noticeable bump?
Reply Helpful Comment? 0 0
This comment has been rated as unhelpful by Slickdeals users
Joined Dec 2009
L5: Journeyman
648 Posts
153 Reputation
#12
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 Helpful Comment? 1 0
Last edited by spamdie January 23, 2020 at 09:10 AM.
This comment has been rated as unhelpful by Slickdeals users
Joined Dec 2009
L5: Journeyman
648 Posts
153 Reputation
#13
Quote from dragontales
:
Anyone run these under carpet? Any noticeable bump?
Probably not good to run this wire under carpet.
Reply Helpful Comment? 1 0
This comment has been rated as unhelpful by Slickdeals users
Joined Mar 2008
L10: Grand Master
7,985 Posts
3,666 Reputation
#14
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 Helpful Comment? 1 0
This comment has been rated as unhelpful by Slickdeals users
Joined Sep 2011
Deplorable
2,655 Posts
564 Reputation
Our community has rated this post as helpful. If you agree, why not thank ?
#15
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 Helpful Comment? 4 0
Page 1 of 6
1 2 3 4 5
Join the Conversation
Add a Comment
 
Link Copied to Clipboard