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Yellow ABS plug-in tester with LED indicator lights

Nilight 50338RV 30 AMP RV Circuit Tester electrical system tool

SKU CH-BN0S-FPD20 MPN 50338RV

Tests 30‑amp RV hookups for correct wiring with LED diagnostics and ETL‑listed safety

  • Team affiliation1 Piece
  • Key features1pc RV Circuit Tester, ETL, Corded Electric, false
  • Product typeElectrical Measurements
  • Verifies 30-amp RV power before hookup
  • LED display diagnoses seven wiring faults instantly
  • ETL-listed safety certification for peace of mind
  • Flame-retardant ABS shell resists heat and wear
  • 100 % pure-copper plug ensures maximum conductivity

30 AMP RV Circuit Tester

The Nilight 50338RV is a 30 AMP RV circuit tester built with a NEMA TT-30P plug rated for 125 volts and 3750 watts. It verifies shore power wiring before you connect your vehicle, helping prevent damage to onboard electronics. The housing uses a flame-retardant ABS sheath and 100 percent pure copper conductors for reliable conductivity. It suits most RVs, campers, trailers and motorhomes.

RV owners and campsite wiring checks

This tool suits RV owners who need to confirm that a 30 AMP pedestal is wired correctly before hooking up. The LED indicator array shows conditions such as correct wiring, open ground, reverse polarity, open neutral, hot-ground reverse and hot-neutral reverse with neutral open. It is not for users who require a 50 AMP tester or a device that measures voltage or current values numerically. Builders needing a permanent installed monitor should look at a different product class.

NEMA TT-30P plug rated 125V 3750W

The single specification that decides fit is the NEMA TT-30P male plug rated for 125 volts and 3750 watts. Only pedestals with this exact 30 AMP configuration will accept the tester. If your RV uses a 50 AMP inlet or a different connector type, this unit will not connect and cannot analyse the supply.

How it compares

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Price $30.99
Typical for this category: the median of 971 items is $30.99.

Specifications

Product
Brand nameNilight
Product typeElectrical Measurements
More details
Team affiliation1 Piece

Questions about this item

What does the NEMA TT-30P 30-amp plug cap in practice?

The plug is rated for 125 volts and 3750 watts, so it verifies shore-power sources up to that limit before you connect RV equipment.

What physical clearance does the tester need at a campsite pedestal?

Its compact body and anti-slip grip fit standard 30-amp TT-30 receptacles without blocking adjacent outlets.

How is the tester installed and what step is often missed?

Turn the pedestal breaker off, insert the TT-30P plug fully, then turn the breaker on and read the LED pattern.

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