will this power an 18vdc motor and not fold back when trying to start the motor?

It honestly depends on the motor you are trying to start. I have used this adapter to test a small toy helicopter (it was missing its lithium polymer battery pack) and it ran just fine, though I have never used it on a motor that needed more than 12 volts to operate. You can always connect a capacitor in parallel to the line, let the adapter charge it up, and then when you start the motor, the initial current draw will be alleviated by the capacitor and the adapter will then give a constant current flow for operation. if there is too much power draw the device will temporarily shut of and then reboot after 5 seconds after all loads have been disconnected. I have short-circuited the adapter a fair few times (mostly on accident) without any long term issues that I can tell.

I think small short cable is Not an extension but is a reverse polarity cable for devices that need reverse polarity otherwise would cause damage?

The short cable is identified as changing the polarity of the tip from center positive to center negative; useful for guitar effects pedals which typically are CN. I don’t think Sergio 2020 is correct in their answer. I have a separate adapter cable that fulfills this same purpose and does so safely for my effects pedals.

What awg wire is run in the dc cable running from the power supply to the dc receptacle?

It appears to be around 14 ga, which is common residential wiring. Hope this helps.

Dc 4v 24v 5a 120w | Desertcart Greece

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€ 68.62

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Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔋 Power your world, your way — no compromises.

POWER THAT ADAPTS TO YOU - Adjust voltage seamlessly from 4V to 24V with precision knob control and real-time LCD readout.
PLUG AND PLAY CONVENIENCE - 6ft long cable and off-gear switch let you power up or shut down without unplugging—perfect for busy workspaces.
ONE ADAPTER TO RULE THEM ALL - From LED strips to smart speakers, routers to surveillance systems, this 120W powerhouse covers all your indoor electronics.
BUILT FOR SAFETY BUILT TO LAST - Multiple built-in protections guard against overvoltage, overcurrent, overheating, and short circuits.
UNIVERSAL COMPATIBILITY UNLOCKED - Includes 14 frequently used tips plus polarity converter to power almost any device in your tech arsenal.

The SHNITPWR 120W Universal AC Adapter offers adjustable DC output from 4V to 24V at up to 5A, featuring 14 connector tips and a polarity converter for broad device compatibility. Its LCD display ensures precise voltage settings, while multiple safety protections guarantee reliable, noise-free operation. Ideal for powering a wide range of indoor electronics, this adapter combines versatility, safety, and convenience in one sleek package.

Specifications

ASIN	B08N4R48LJ
Amperage	5 A
Best Sellers Rank	#117,369 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #449 in Power Converters
Brand	SHNITPWR
Built-In Media	Cable
Color	Black
Compatible Devices	LED strips, TV boxes, routers, smart speakers, USB fans, Wifi cameras, hubs, hard disk DC motors, pumps, digital photo frames, DVR NVR surveillance systems
Compatible Power Plug Type	Type A - 2 pin (North American)
Connectivity Technology	USB
Connector Type	barrel connector
Current	DC
Current Rating	5 A
Customer Reviews	4.2 4.2 out of 5 stars (543)
Enclosure Material	Plastic Or Aluminum
Frequency Range	50Hz to 60Hz
Input Voltage	240 volts
Item Weight	1.1 pounds
Main Power Connector Type	2 Pin
Manufacturer	Shenzhen shi nai te dian zi ke ji you xian gong si
Mfr Part Number	SNT-0324-120
Model Number	SNT-0324-120
Mounting Type	Wall Mount
Number of Items	1
Output Current	5 A
Output Voltage	24 volts
Plug Type	5.5x2.5mm 6.5x4.4mm+Pin, 5.5x2.1mm, 5.5x3.0mm+Pin, 5.0x2.5mm, 6.3x3.0mm, 5.5x1.7mm, 4.8x1.7mm, 4.0x1.7mm, 3.5x1.35mm, 3.0x1.1mm, 2.5x0.7mm, Micro-USB, Type-C and DC terminal connector
Power Plug	Type A - 2 pin (North American)
Power Source	ac
Special Features	Adjustable
Specification Met	CCC
Total Usb Ports	1
UPC	619191117338
Unit Count	1 Count
Wattage	120 watts
Wired Charging Connector Type	USB Type C

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