How heavy should your anchor be?

As a general rule, a holding power of 90 pounds is sufficient for safely anchoring a 20' boat in winds up to 20 mph. For the same wind speed a holding power of 125 pounds is adequate for a 25' boat.

bassproboatingcenters.com - How to Choose an Anchor - Bass Pro Shops Boating Center

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Does your boat have an anchor? If so, is it of sufficient size and strength to hold your boat in place? Believe it or not, many boat owners decide on which anchor to buy based on convenience and storage space. A visit to your boat dealer will prove there is more to choosing an anchor than how handily it stores in the boat, though. Anchors come in a variety of shapes and sizes, just like the boats they anchor. The reason why there are so many choices comes down to the weather, type of boat and size, as well as the bottom conditions where the anchor will be used. Don’t be the guy who digs out the anchor from the storage compartment, tosses it overboard and discovers that it’s too small to hold the boat during an afternoon swim. Visit your nearest Bass Pro Shops/Cabela’s Boating Center to find the right anchor for your boat. Before you go, read these tips to get started making the best choice.

Holding power

It might make sense to choose an anchor based on the weight of the boat. However, anchors are rated by their holding power, or the amount of pull force the anchor must withstand to hold the boat in place. Holding power is formulated based on environmental factors, like wind speed. As a general rule, a holding power of 90 pounds is sufficient for safely anchoring a 20' boat in winds up to 20 mph. For the same wind speed a holding power of 125 pounds is adequate for a 25' boat. This is why anchors that rely strictly on their weight—such as a space-saving, plastic coated 10-pound mushroom anchor—are only capable of generating more than twice their weight in holding power. A 20' fiberglass bass boat using a 20-pound anchor will always drag if design is the only buying consideration.

Weight

Bigger is better when choosing anchor weight. You won’t need as much for holding the boat in a quiet cove, but you will need much more weight for an emergency situation in the wind. You can also carry two anchors of differing weights. A smaller “lunch hook” is adequate for short anchorages in calm water when you will be keeping watch on the anchor. You’ll also want to have a larger “working anchor” for overnight trips or when going ashore in gusty winds. Using two differing anchor styles can also be beneficial, especially with high-profile boats like pontoons.

Bottom conditions

Holding power and weight are only as good as the anchor’s ability to penetrate the bottom. Anchors easily penetrate hard sand bottoms, which offer consistent holding power. You get less in mud, which the anchor must penetrate to reach a harder secondary bottom material. Anchor weight is more important than design in difficult grassy bottoms.

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What size electric cable do I need for a shed?

10mm seems a nice size for the average shed in an average garden, it allows a modicum of headroom.

community.screwfix.com - what size cable for shed ? | Screwfix Community Forum

Hi

i am a diyer with a bit of site time and i am getting a proper spark to do the job but just need some input from outside . i have a large shed that i will be using the odd power tool drill / bench grinder and will have a tv and electric heater we have got 16mm armoured to run the 25m down the garden . what i need to know is what size cable do i need to run the 6m from my fuse box in my home to the external wall box where we will join to the armoured . i have been told 16mm T&E but then told by another spark this is exssesive and i only need 6mm both qualified sparks but who do i listen too thanks for reading and thanks in advance to anyone that takes the time to help a poor diyer