Question 1

does this actually place a load on the circuit for for voltage drop?

Accepted Answer

It simulates a 12,15, and 20 amp load and displays the percentage drop, according to the operating instructions.

Question 2

Will this indicate open neutral or open ground when circuit is not energized?

Accepted Answer

Way late on answer this.
If you’re talking about (Klein Tools RT210 Outlet Tester) then no, it has to have power on the circuit as this is not battery powered to show the tester how it’s wired.

Question 3

Does this simulate and test both serial and parallel arc fault conditions?

Accepted Answer

This tester plugs into an outlet on the circuit under test, so it seems to me that automatically makes it a parallel device. Therefore it can only simulate an arc fault such as might occur in a parallel device, i.e. what you normally plug into an outlet. (A typical faulty item being be a lamp with a frayed power cord.) I believe the tester would have to be wired into the circuit in series to simulate a serial arc fault. I don't know the nature of the tester's design but it may be that tripping an AFCI unit (an AFCI outlet, for instance) with a parallel fault simulation may also prove the AFCI's ability to respond to a serial arc fault, at least in part. Disclaimer: I'm not an electrician or EE so you may want to dig farther on this subject, but I believe I have the basics right.

Question 4

Does this protect trip a gfci protected receptacle with an open ground?

Accepted Answer

No it will not. No tester will trip a GFCI with open ground. You have to use the button on the receptacle/breaker in that case. Make sure the outlet is labeled with "no equipment ground."

ASIN	B0BT87LJRL
Amazon.co.jp での取り扱い開始日	2023/3/20
カスタマーレビュー	4.8 5つ星のうち4.8 (277) var dpAcrHasRegisteredArcLinkClickAction; P.when('A', 'ready').execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( 'acrLink-click-metrics', 'click', { "allowLinkDefault": true }, function (event) { if (window.ue) { ue.count("acrLinkClickCount", (ue.count("acrLinkClickCount") \|\| 0) + 1); } } ); } …
商品モデル番号	RT390
製品サイズ	17.96 x 6.91 x 3.84 cm; 222.26 g

Klein Tools RT390 Circuit Analyzer with Large LCD, Identifies Wiring Faults, GFCI and AFCI Tester, Voltage Drop, Displays Trip Time

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