A bunch of good and couple great tips in that last post. Very useful.
Totally agree weight of plugs and cables should be supported so as not to put stress on the connection. In many cases I have been able to sort of hang my cable over the top of the pedestal. Whatever works to keep firm contact between the outlet and the plug.
A non contact voltage detector works fine to orient line voltage and neutral wires.
Great tool. What this little guy does is detect if there is voltage/current in a wire without having to have a neutral/ground wire connect to the probe. Just get the tip of this tool near the slot in an outlet or near a wire - even through the insulation - and one of these things will immediately tell you if the wire is hot.
I have had a Klein for years as an electrician friend told me he liked Klein tools the best. I have seen lots of electricians using Fluke. Home Depot, Lowes, Amazon will all have them.

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Klein Tools
Non-Contact Voltage Tester
Detects non-contact voltage in cables, cords and circuit breakers
Red LED illuminates with warning tone when voltage is detected
Features heavy-duty polycarbonate plastic resins
$16.98
http://www.homedepot.com/p/Klein-Tools-Non-Contact-Voltage-Tester-NCVT-1SEN/100661787

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Southwire Digital Voltage Detector Meter
Item # 803668 Model # 40136N
$18.98
https://www.lowes.com/pd/Southwire-Digital-Voltage-Detector-Meter/1000095135

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Fluke 1AC-A1-II VoltAlert Non-Contact Voltage Tester
$27.13
• Voltbeat technology and continuous self test so you always know it is working
• Upon detection, tip glows and beeper sounds, IP Rating: IP 40
• 20 volt to 90 volt AC control circuit model also available
• CAT IV 1000 V for added protection,Operating Altitude : 3000 meters
• Voltage sensing ranges: Nominally, 90 V AC to 1000 V AC
• A red glow at the tip and a beeping noise (if not switched OFF) indicates the presence of voltage
https://www.amazon.com/Fluke-1AC-A1-II-VoltAlert-Non-Contact-Voltage/dp/B00ATGPRRQ/ref=sr_1_5?ie=UTF8&qid=1504156694&sr=8-5&keywords=non-contact+voltage+detector