Outdoor Outlet Box with Timer - SHMGT20A
DEWENWILS Outdoor Outlet Box with 20 AMP WRTR GFCI Receptacles, Countdown Function & 4/8Hrs Cycle, 125V/2500W, 1/2hp Rainproof 3R Enclosure, Outdoor Electrical Outlet Box for Decor, Yard - HMGT20A
Save $10
ORDERS OF $100+
-
Estimated delivery: Sep 20 - Sep 24
Couldn't load pickup availability
Specifications
Specifications
- Rateed Voltage, Frequency: 125V,60HZ
- Rated Current: 20A
- Max Wattage: 2500 W
- Number of Outlets: 2
- Outlet Type:
- Enclosure Rating & Certification: NEMA-3R, ETL
- Mounting Type: Hardwired Connection
- Reserved Holes: 7
- Product Dimensions (L x W x H): 9.06 X 7.87 X 6.89 inch
- Net Weight: 4.59lbs
About this item
Free Shipping
30-Days Free
Secure Payment
Fast Delivery
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.







- 【Daily Cycle & Smart Timer Function】: This outdoor outlet box with switch lets you set it once and forget it—automatically cycles daily to turn devices on and off at the same time; choose between 4H/8H cycle modes or 1/2/4/8 hour countdown settings, perfect for outdoor lights, garden watering, or other equipment
- 【Reliable GFCI Protection】: Automatically shuts off power in the event of ground faults to prevent electrical hazards; this outdoor gfci outlet with cover is perfect for powering backyard lights, patio heaters, garden tools
- 【Large Space & Power Indicator】: Our outdoor GFCI receptacle box features a spacious interior for easy wiring and secure installation, with a built-in indicator light to clearly show power status
- 【Weatherproof & Durable】: Spray-painted iron plate outdoor outlet box meets NEMA-3R standards for rain, dust, and rust protection; works with 20 amp GFCI outlet outdoor, with lock hole for added security
- 【Easy to Install & Wire】: No drilling required—pre-punched sides with 3 hole sizes (1/2", 3/4", 1") ensure quick, secure wiring; the outdoor outlet cover conveniently stays open during installation for easier setup
Shipping
Free shipping on all orders. Products are shipped from U.S. local warehouses for faster and more reliable delivery.
Learn more in our Shipping Policy.
Returns
If you’re not satisfied with your purchase, returns are accepted according to our return guidelines.
Please review our Return Policy for details.

UGC PROGRAM | UP TO 50% CASH BACK 💴
50% product cashback for Video Creators
Extra 20% OFF store coupon
Up to 500 Bonus member points
Partner with us and start earning by promoting our products. Sign up today!
Recommended For You
Not sure which outlet you need? Filter by outlet type, outlet number, or other features—find the right match in seconds.
Outdoor Outlet Box with Timer - SHMGT20ARegular price
$5999
Sale price
$5999
Regular price
|
Outdoor Outlet Box with Timer - SHMGT20ARegular price
$5999
Sale price
$5999
Regular price
|
Outdoor Outlet Box with Dual GFCI - SHMGB02ARegular price
$5999
Sale price
$5999
Regular price
|
|
|
2 |
2 |
4 |
|
|
125V,60HZ |
125V,60HZ |
125V,60HZ |
|
|
2500 W |
2500 W |
2500 W |
|
|
|
|
|
|
|
/, ETL |
NEMA-3R, ETL |
NEMA-3R, ETL |
|
|
Hardwired Connection |
Hardwired Connection |
Hardwired Connection |
|
|
9.06 X 7.87 X 6.89 inch |
9.06 X 7.87 X 6.89 inch |
9.06 X 7.87 X 6.89 inch |
|
|
4.59lbs |
4.59lbs |
4.63 lbs |
Frequently asked questions
What if there’s an issue with my order or product?
What if there’s an issue with my order or product?
If you experience any issues, simply contact our support team.
Support Email: service@dewenwils.com
We’ll work with you to find a quick and fair solution.
Questions about Shipping:
Questions about Shipping:
Q: How long does shipping take?
A: Orders are typically processed within 1-2 business days.
Delivery times vary by location, but most orders arrive wvithin 3-7 business days.
Q: How much does shipping cost?
A: We offer free shipping on all orders.
No minimum purchase required.
Questions about After-Sale:
Questions about After-Sale:
Q: How can I contact customer support?
A: You can reach us anytime via the contact form on this paage
Our support team typically responds within 24 hours on bpusiness days
Support Email: service@dewenwils.com
Q: What if there's an issue with my order or product?
A: If you experience any issues, simply contact our support teaam
We'll work with you to find a quick and fair solution.
Q: Are your products covered by a warranty or guarantee?
A: Yes. All our products are backed by a 365-day warranty.
If you experience any quality-related issues within this period,our support team will be happy to help you with a solution.
Questions about Outdoor GFCI Outlet Boxes:
Questions about Outdoor GFCI Outlet Boxes:
1. What is An Outdoor GFCI Outlet Box?
An Outdoor GFCI Outlet Box is a weatherproof electrical enclosure with built-in Ground Fault Circuit Interrupter (GFCI) protection. It continuously monitors electrical current and shuts off power within milliseconds if a leakage or imbalance is detected, helping reduce the risk of electric shock.
It is commonly used in outdoor areas such as patios, gardens, backyards, pools, garages, RV sites, and exterior lighting systems.
2. What Can I Power With A 20 Amp Outdoor GFCI Outlet Box?
A 20AMP Outdoor GFCI Outlet Box can power a wide range of common outdoor electrical devices, as long as the total load does not exceed 2500W.
Typical applications include lawn mowers, hedge trimmers, outdoor lighting, water pumps, holiday decorations, and general residential outdoor equipment. It is also suitable for RV sites and other grounded outdoor power setups.
3. What Materials Are Used For The DEWENWILS Outdoor GFCI Outlet Box?
DEWENWILS Outdoor GFCI Outlet Boxes are built with durable metal enclosures for reliable long-term outdoor use.
Depending on the model, the housing is constructed from either heavy-duty die-cast aluminum or weather-resistant galvanized steel. Both are designed to meet NEMA 3R weatherproof standards, providing protection against rain, snow, dust, and corrosion in outdoor environments.
4. What Does NEMA 3R Mean For Outdoor Outlet Boxes?
NEMA 3R is an electrical enclosure rating that indicates suitability for outdoor use, with protection against rain, snow, dust, and falling debris, helping ensure reliable performance in residential outdoor environments.
5. How to Install Outdoor GFCI Outlet Box?
The enclosure is designed with multiple pre-punched knockouts for flexible wiring entry, making installation more convenient. Simply mount the box to a stable surface, route the electrical cables through the knockouts, and complete wiring following standard electrical practices.
For safety, always ensure the power is turned off before installation.
6. How To Replace Outdoor GFCI Outlet Box?
Before replacement, always turn off the main power supply to ensure safety. Remove the existing outlet box, disconnect the wiring, and install the new unit by securing it to the mounting surface.
It is recommended to take a photo of the existing wiring before removing the old outlet from the wall, so you can reconnect the wires correctly during installation.
7. Precautions for Using Outdoor GFCI Outlet Box
For safe and reliable use, please follow these precautions:
● Ensure the outlet box is correctly installed and securely closed before use.
● Should be connected to a grounded 125V AC electrical system.
● Do not exceed the rated capacity of 20AMP / 2500W.
● Avoid using damaged cords or incompatible electrical devices.
● Always keep the flip lid fully closed when not in use to maintain the NEMA 3R weatherproof sealing and prevent moisture, dust, and debris from entering.
● Regularly inspect the unit for wear or damage, and always turn off power before any maintenance or adjustment.
8. Why Does My Outdoor GFCI Outlet Keep Tripping?
A GFCI outlet is designed to automatically trip when it detects a dangerous electrical leakage, helping prevent electric shock.
Common causes include:
● Moisture, rain, or dew entering the outlet if the flip lid is not fully closed
● Overloaded circuits where connected devices exceed the 20AMP / 2500W capacity
● Damaged power cords, cracked devices, or worn wiring
● Faulty outdoor equipment such as water pumps, garden tools, or pool devices with internal electrical issues
● Aging or malfunctioning GFCI receptacle that may require replacement
Troubleshooting tips:
Unplug all connected devices, ensure the lid is fully closed, and reset the GFCI. If it continues to trip immediately, disconnect power and contact a qualified electrician for inspection.

